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Gopherus
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Gopherus
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Gopherus
Temporal range: Priabonian–Recent
Gopher tortoise, Gopherus polyphemus
Scientific classification Edit this classification
Kingdom: Animalia
Phylum: Chordata
Class: Reptilia
Order: Testudines
Suborder: Cryptodira
Family: Testudinidae
Genus: Gopherus
Rafinesque, 1832
Species
  • Gopherus agassizii (Cooper, 1863)
  • Gopherus berlandieri (Agassiz, 1857)
  • Gopherus evgoodei Edwards et al., 2016
  • Gopherus flavomarginatus Legler, 1959
  • Gopherus morafkai Murphy et al., 2011
  • Gopherus polyphemus (Daudin, 1802)
Distribution of the genus Gopherus

Gopherus is a genus of fossorial tortoises commonly referred to as gopher tortoises. The gopher tortoise is grouped with land tortoises that originated 60 million years ago, in North America. A genetic study has shown that their closest relatives are in the Asian genus Manouria.[1] The gopher tortoises live in the southern United States from California's Mojave Desert across to Florida, and in parts of northern Mexico. Gopher tortoises are so named because of some species' habit of digging large, deep burrows (gophers are small terrestrial burrowing rodents). Most notably, Gopherus polyphemus digs burrows which can be up to 40 feet (12 m) in length and 10 feet (3.0 m) in depth.[2] These burrows are used by a variety of other species, including mammals, other reptiles, amphibians, and birds.[3] Gopher tortoises are 20–50 cm (7.9–19.7 in) in length, depending on the species.[4] All six species are found in xeric habitats. Numerous extinct species are known, the oldest dating to the Priabonian stage of the Late Eocene of the United States.[5]

Species

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In July 2011, researchers decided on the basis of DNA, and morphological and behavioral data that the Sonoran and Mojave populations of the desert tortoise, G. agassizii were distinct species.[6] This newly described species was named G. morafkai, or the Morafka's desert tortoise. The acceptance of G. morafkai reduced the range of G. agassizii by about 70%[7] In 2016, based on a large-scale genetic analysis, ecological and morphological data, researchers proposed a split between the Sonoran and Sinaloan populations.[8] This southernmost member of the Gopherus genus was named G. evgoodei.[8] As such, there are currently six recognized extant species in the genus Gopherus:

Extant

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Listed alphabetically by binomial name:[9]

Image Common name Scientific name Distribution
Mojave desert tortoise Gopherus agassizii

(Cooper, 1863)

Endemic to USA. Mojave Desert in southeastern California,

southern Nevada, and extreme southwestern Utah and northwest Arizona, north and west of the Colorado River.[10]: 3–4 p. 

Texas tortoise Gopherus berlandieri

(Agassiz, 1857)

Tamaulipan mezquital ecoregion of south Texas,

USA, eastern Coahuila, northern Nuevo León, and Tamaulipas, Mexico with a few old records (questionable) from southern San Luis Potosí.[11]: 25 & 27p. 

Goode's thornscrub tortoise Gopherus evgoodei Edwards et al., 2016[8] Endemic to Mexico. Tropical deciduous forest and thornscrub in southern Sonora and adjacent areas of extreme northern Sinaloa

and extreme southwestern Chihuahua.

Bolson tortoise Gopherus flavomarginatus

Legler, 1959

Endemic to Mexico. Chihuahua Desert of North-central Mexico,

in the vicinity of the conjunction of the Chihuahua, Coahuila, and Durango state borders.

Sonoran desert tortoise Gopherus morafkai

Murphy et al., 2011[6]

Sonora Desert in northern Sonora, including Tiburon Island,

Mexico and southwest Arizona, south and east of the Colorado River.[10]: 4 p. 

Gopher tortoise Gopherus polyphemus

(Daudin, 1802)

Endemic to USA. Extreme eastern Louisiana,

southern Mississippi, southern Alabama, southern Georgia, Florida, and extreme southeastern South Carolina.

Fossil

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Members of Gopherus that became extinct in the late Pleistocene:

  • †Gopherus donlaloi (Reynoso and Montellano-Ballesteros, 2004)[12][13][14]
  • †Gopherus depressus[15]
  • †Gopherus hexagonatus (Cope, 1893) Late Pliocene-Late Pleistocene, large sized species, with carapaces over a metre (3.3 ft) in length.[16]

Breeding

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Gopher tortoises usually mate during April and May. The female will then choose either a sunny spot nearby or a sandy mound in front of her burrow to lay between 3 and 15 eggs. The eggs then hatch from 70 to 100 days later. Once hatched, the baby tortoises spend most of their time in their mother's burrow until they learn to dig their own burrow. They do not reach maturity until they are around 10 to 15 years old. Gopher tortoises have an abbreviated mating season in early spring, when male tortoises visit the female tortoise' burrows and mate with them.[17]

Diet

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Gopher tortoises are mainly herbivores that feed on low growing plant life. Their diet consists mostly of grasses and legumes but they will also feed on small berries and fruits.

Desert tortoise (Gopherus agassizii) drinking from roadway in Joshua Tree National Park

The diet of tortoises contain excess salt, sodium, chloride, and potassium that must be purged from the body, and drinking free standing water, even if only once or a few times each year, is essential for this function and for tortoise survival. Opportunities for gopher tortoises to drink water vary greatly between the species in the genus. Gopherus agassizii live in extremely arid areas that can receive as little as 10–20 cm. per year. Gopherus polyphemus live in mesic habitat, where water is available and evaporative loss is less problematic. Other species live in intermediate environments where a few weeks of rain typically occur twice per year, or where relatively consistent summer rains occur. When pools of rain water or saturated soils are available tortoises will direct their heads face down and submerge their face to a level just below the eyes and drink copiously. Reptiles modify urine and plasma concentrations in their bodies with their bladder, cloaca, and colon, rather than the kidneys. The bladder plays a major function in regulating blood osmolality: permeable to ammonia, urea, water, and small ions, but not uric acid. This permeability allows tortoises that are hibernating, or living in arid environments without drinking water for months at a time to store uric acid, but resorb water from the bladder. Tortoises react to dry periods by retreating to shelters (burrows, caves etc.) with more humid microhabitats, and remaining inactive. Gopher tortoises can survive a year of drought through both behavior and physiological adaptations, two years of drought can result in deteriorating body conditions, and extended years of drought will produce high mortalities of gopher tortoises.[18]: 85–87, 94 pp. 

There are many observations of Gopherus eating non-vegetation food items. Documented examples include a variety of bones, snail shells, soil at mineral licks, charcoal, sand, stones, human trash, carrion, raptor pellets and various animals feces. Gopherus polyphemus studies observed specimens moving bones into their burrows and found the fourth most common matter in their scats was insect material. The exact reasons are not entirely understood, some cases might simply be due to accidentally ingesting materials near food items or sampling potential foods. Hypotheses concerning the consumption of animal matter by Gopherus include supplements for the low levels of calcium, phosphorus, or protein in their diet, and a need for calcium carbonate in bones, the production of eggshells in females, and growing young. Hypotheses on the consumption of nonfood items such as soil or rocks include mastication or vermifuge for the removal of parasites.[18]: 93 p. 

Conservation

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Texas tortoise (Gopherus berlandieri), northern Tamaulipas, Mexico

Populations of all six species of Gopherus have declined dramatically. In the past, gopher tortoises were hunted for their meat, which was used in stews.[19] Currently the most significant threat to their survival is habitat destruction, but the pet trade and collisions with vehicles have also taken their toll.[4] To help decrease gopher tortoise death due to collisions with vehicles, the US Department of Transportation in Mississippi has recently placed angled fences along the road side to keep tortoise from wandering onto the highways near their habitats.[20] On November 9, 2009, the US Fish and Wildlife Service proposed rulemaking to include the eastern population of the gopher tortoise, Gopherus polyphemus, in the List of Threatened Wildlife.[21] In 2018, the IUCN Tortoise and Freshwater Turtle Specialist Group recommended a re-assessment and re-classification of all six Gopherus species[22] This reclassification would move G. agassizii from Vulnerable (VU) to Critically Endangered (CR), G. berlandieri from Near Endangered (NE) to Near Threatened (NT), G. evgoodei from Near Endangered (NE) to Vulnerable (VU), G. flavomarginatus from Vulnerable (VU) to Critically Endangered (CR), G. morafkai from Near Endangered (NE) to Vulnerable (VU) and G. polyphemus from Vulnerable (VU) to Endangered (EN).[22]

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  • A juvenile bolson tortoise (Gopherus flavomarginatus), from Durango, Mexico (7 July 2006)
    A juvenile bolson tortoise (Gopherus flavomarginatus), from Durango, Mexico (7 July 2006)
  • Desert tortoise (Gopherus agassizii) San Bernardino County, California, US.
    Desert tortoise (Gopherus agassizii) San Bernardino County, California, US.
  • Gopher tortoise (Gopherus polyphemus) from Lee County, Florida (18 June 2018)
    Gopher tortoise (Gopherus polyphemus) from Lee County, Florida (18 June 2018)
  • Gopher tortoise (Gopherus polyphemus) from Volusia County, Florida (14 September 2008)
    Gopher tortoise (Gopherus polyphemus) from Volusia County, Florida (14 September 2008)

References

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Gopherus

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from Grokipedia

Gopherus is a of in the family Testudinidae, endemic to and comprising six extant species adapted to diverse xeric and semi-arid habitats ranging from deserts and grasslands to pine savannas. These species include G. agassizii (Mojave desert tortoise), G. morafkai (Sonoran desert tortoise), G. polyphemus (), G. berlandieri ( tortoise), G. flavomarginatus (Bolsón tortoise), and G. evgoodei (Goode's tortoise). The genus is distinguished by its lifestyle, with robust forelimbs specialized for excavating deep burrows that serve as refugia from predators and environmental extremes, often exceeding 3 meters in length and supporting over 300 commensal species as a keystone ecological role. Individuals exhibit determinate growth, longevity typically surpassing 50 years in the wild, and low with delayed until 10–20 years, reflecting life-history strategies evolved for stable but harsh environments. Species of Gopherus are distributed across the southwestern and into , with G. occupying longleaf pine-wiregrass ecosystems in the Southeast, desert species like G. agassizii and G. morafkai in rocky bajadas and washes of the Mojave and Sonoran Deserts receiving minimal annual precipitation, and G. flavomarginatus confined to remnant grasslands in Chihuahua. Burrowing behavior mitigates and temperature fluctuations, while herbivorous diets of grasses, forbs, and succulents sustain populations in nutrient-poor soils. Evolutionary divergence within the genus traces to Pleistocene isolation events, with genetic and morphological distinctions—such as shell scalation and limb proportions—evident among lineages, as confirmed by osteological and molecular analyses. Most Gopherus species face population declines, classified as vulnerable or threatened under IUCN criteria and protected under the U.S. Endangered Species Act in portions of their ranges, primarily due to direct conversion for urban development, , and fire suppression altering vegetative structure. Secondary pressures include vehicular mortality, collection for pets, and increased predation from subsidized , though empirical data emphasize land-use change as the dominant causal driver over climatic shifts alone. Conservation efforts prioritize preservation, prescribed burns to maintain open canopies, and translocation, yielding variable success tied to burrow fidelity and disease risks like upper pathogens. These tortoises exemplify how anthropogenic landscape fragmentation disrupts evolved predator-prey dynamics and resource availability in arid systems.

Taxonomy and Phylogeny

Extant Species

The genus Gopherus includes six extant species, all of which are terrestrial tortoises native to North America, primarily inhabiting xeric environments in the southwestern and southeastern United States and northern Mexico. These species diverged into two major phylogenetic clades approximately 4–8 million years ago, reflecting adaptations to distinct habitats ranging from deserts to coastal plains. Gopherus polyphemus, commonly known as the , occurs in sandy soils of the , from westward to , with the largest populations in . It is classified as Vulnerable on the due to habitat loss and fragmentation, with populations declining by over 80% in some areas over the past century. Gopherus berlandieri, the , is distributed in southern south of a line from Del Rio to and Rockport, extending into northeastern including , , and . It prefers grasslands and thorn scrub, tolerating arid conditions, and is listed as Least Concern by the IUCN, though local declines have occurred from habitat conversion. Gopherus agassizii, the , is endemic to the across parts of , , , and . It faces severe threats from , , and predation, leading to its Vulnerable status on the . Gopherus morafkai, the , inhabits the in central and and northwestern , , having been distinguished from G. agassizii based on genetic and morphological differences. Its mirrors that of congeners, with ongoing assessments highlighting vulnerabilities to drought and habitat degradation. Gopherus flavomarginatus, known as the , is restricted to the Bolsón de Mapimí in , spanning Chihuahua, , , and . It is considered Vulnerable by the IUCN due to restricted range and low population numbers, with U.S. populations federally listed as Endangered. Gopherus evgoodei, or Goode's thornscrub tortoise, was described in 2016 and occurs in the Sinaloan thornscrub and tropical deciduous forests of western Mexico, including and southern . Distinguished by a flatter , yellow-orange , and enlarged spurs on the forelimbs, it represents a distinct lineage adapted to coastal scrub habitats, with conservation needs emerging from recent taxonomic recognition.

Fossil Species

The fossil record of Gopherus extends from the early to the late , encompassing approximately 23 extinct alongside occurrences of extant taxa. This temporal range reflects the genus's evolutionary persistence in North American xeric environments, with fossils primarily from the western and as well as . The earliest recognized species, Gopherus laticuneus, is known from the White River Formation in and , dating to approximately 33-32 million years ago, and is considered an ancestral form lacking certain derived features like the xiphiplastral present in later gopher tortoises. Other taxa include G. neglectus and G. praeextans. Early Miocene species, such as G. brevisternus, G. edae, G. emiliae, G. hollandi, and G. undabunus, indicate diversification during this period. Late forms like G. brattstromi, G. copei, G. dehiscus, G. mohavetus, and G. pansus show increasing specialization toward burrowing adaptations characteristic of the . Pliocene and Pleistocene fossils document further radiation, including G. pertenuis from the late and several Pleistocene species such as G. atascosae, G. auffenbergi, G. canyonensis, G. hexagonatus, G. huecoensis, and G. laticaudatus. Notable among these is G. donlaloi, a large-bodied species from Rancholabrean () deposits in , , represented by a partial with measuring over 70 cm in length, suggesting in some lineages.024[0822:ANGTOT]2.0.CO;2) Fossils of extant species (G. agassizii, G. flavomarginatus, G. polyphemus) appear in late Pleistocene assemblages, often co-occurring with extinct congeners in southeastern U.S. sites from late to Rancholabrean ages, implying continuity but also local extinctions tied to climatic shifts.

Evolutionary History

The genus Gopherus occupies a basal position within the Testudinidae, with molecular phylogenies indicating a sister-group relationship to the Asian genus Manouria, suggesting deep divergence within the family potentially tracing back to Eocene origins in Asia or North America. Fossils attributable to gopher turtles, including stem-group forms classified in paraphyletic assemblages like Scaptochelys or Xerobates, first appear in the early Oligocene of North America, marking the initial radiation of fossorial adaptations such as reinforced forelimbs and shovel-like claws for burrowing in arid or semi-arid environments. By the early Middle Miocene (Hemingfordian stage, approximately 16 million years ago), Gopherus sensu stricto emerged as a monophyletic clade of highly specialized tortoises, coinciding with midcontinental environmental shifts including grassland expansion and increased aridity that favored subterranean lifestyles. Phylogenetic analyses integrating molecular data, morphology, and s reveal that major extant lineages diverged during the , with sequence divergences of about 7% between western (G. agassizii and G. berlandieri) and eastern (G. polyphemus and G. flavomarginatus) clades reflecting vicariance driven by tectonic uplift and climatic barriers like the rising . Subsequent diversification within these clades occurred in the to (4-8 million years ago), involving adaptations to xeric habitats and independent evolution of larger body sizes in multiple insular or mainland populations, as evidenced by total-evidence dating that reconciles calibrations with genetic clocks. glacial-interglacial cycles prompted range expansions and contractions, with s documenting incursions into southeastern and persistence in refugia like the Sierra Vieja caves, where Gopherus remains show continuity with modern forms amid megafaunal extinctions. Biogeographic reconstructions support a North American center of origin for Gopherus following Testudinidae's transcontinental dispersal, rejecting models of recent long-distance migration in favor of ancient vicariance, though the genus's burrowing specialization likely buffered it against faunal turnovers. Over 20 species are known from through Pleistocene deposits across the continent, highlighting episodic and regional before anthropogenic pressures reduced diversity to six extant species.

Physical Characteristics

Morphology and Adaptations


Species of the genus Gopherus are robust, medium-sized terrestrial tortoises with adult straight midline carapace lengths typically ranging from 200 mm in G. berlandieri to 350 mm in G. flavomarginatus, and intermediate sizes of 215–350 mm in species such as G. agassizii and G. polyphemus. The carapace is high-domed, oblong, and colored brown to grayish-black, composed of fused dermal bones and keratinous scutes that provide protection from predators and facilitate thermoregulation by maintaining internal temperatures through solar absorption and insulation. The plastron is hingeless, yellowish with brown edges, and features an anteriorly projecting gular scute, which is elongated particularly in males and aids in flipping opponents during agonistic encounters or wedging into burrow entrances. Forelimbs are morphologically specialized for excavation, being flattened, heavily scaled with overlapping laminae, and terminating in five stout digits with broad, curved claws that function as spades for displacing soil. Hind limbs contrast as thick, elephantine structures with four digits, providing stability for propulsion and supporting body weight during movement or nesting. Hatchlings exhibit softer, more pliable shells with a large median plastral that ossifies by the fifth year, along with longer, sharper claws relative to body size, enhancing initial burrowing capability amid higher predation risk. These traits collectively adapt Gopherus species to xeric habitats by enabling the digging of extensive burrows—up to 10.9 m long and regulating temperatures between 19–37.8°C—which offer refuge from diurnal heat, nocturnal cold, , fire, and predators while minimizing cutaneous water loss through reduced surface exposure. The domed shell's and thickness vary by population and age, correlating with calcium availability and influencing flexibility, while serrated jaw margins support herbivory on fibrous typical of sandy, well-drained soils.

Sexual Dimorphism and Growth

Sexual dimorphism in Gopherus tortoises is evident primarily in adults, with males typically exhibiting a concave plastron, longer tail, and enlarged compared to females, facilitating mounting during copulation. In G. polyphemus, however, females possess larger shell dimensions and anal notch size than males, with minimal overall size difference at maturity. Conversely, in G. agassizii, males attain larger body sizes than females. Juveniles across species lack pronounced external dimorphism until secondary sexual traits develop, often years after hatching, complicating non-invasive sexing methods like tail length or spur size measurements. Growth in Gopherus is indeterminate and slow, characterized by rapid initial carapace length increases for 18–22 years followed by marked deceleration, influenced by resource availability, habitat quality, and . Annual growth rates typically range from 5–19 mm in carapace length for wild populations, though higher rates up to 34 mm/year occur in disturbed habitats with abundant . is delayed, occurring at 13–20 years in G. agassizii (carapace length ~180–200 mm) and 16–21 years in G. polyphemus (230–265 mm), with females often maturing later than males due to larger size requirements in some populations. Growth differences between sexes are negligible until maturity, after which males may outpace females in certain arid-adapted species like G. agassizii. exceeds 50–100 years, supporting extended post-maturity growth phases.

Distribution and Habitat

Geographic Range

The genus Gopherus comprises six extant species of tortoises endemic to North America, primarily inhabiting arid, semi-arid, and subtropical regions across the southwestern and southeastern United States and northern Mexico. These distributions reflect adaptations to diverse xeric environments, from coastal plains to deserts, with no species occurring outside this continental range. Gopherus polyphemus, the , is distributed across the southeastern U.S. , from southern westward through Georgia, , , and to eastern . Its range aligns with savannas and sandy soils suitable for burrowing. Desert tortoises in the G. agassizii group include G. agassizii (Mojave population), found north and west of the in southeastern , southern , extreme southwestern , and northwestern . G. morafkai (Sonoran population) occupies areas south and east of the , extending into , . G. evgoodei is restricted to coastal regions of southern and northern , . Gopherus berlandieri, the Texas tortoise, ranges from south-central southward into northeastern , including , , and . Gopherus flavomarginatus, the , is confined to grasslands in north-central , specifically Chihuahua, , and . These southern distributions highlight the genus's extension into Mexican biomes, though populations face fragmentation and habitat loss.

Preferred Habitats and Microhabitats

Species of the genus Gopherus inhabit predominantly xeric and semi-arid ecosystems across the southwestern United States and northern Mexico, characterized by well-drained, sandy or gravelly soils that support deep burrowing and sparse to open vegetative canopies with herbaceous understories for foraging. These habitats vary by species but consistently feature low shrub or grass dominance, enabling visibility, thermoregulation, and access to annual plants and forbs. Fire-maintained openness, as in longleaf pine savannas for G. polyphemus, or rocky slopes with palo verde-cactus associations for G. morafkai, enhances suitability by promoting groundcover diversity. The eastern G. polyphemus prefers upland sandhills, pine , and xeric oak with sandy, infertile soils and herbaceous cover exceeding 50% for optimal density. In contrast, Mojave (G. agassizii) and Sonoran (G. morafkai) desert tortoises favor alluvial fans, bajadas, and washes in creosote bush scrub or mixed desertscrub, often augmenting excavated burrows with rocky crevices for shelter. G. berlandieri selects thornscrub grasslands and in southern , prioritizing open grassy areas over denser woody cover. The rare G. flavomarginatus occupies arid bolsons in the at 1,000–2,000 m elevation, amid sparse grasslands on volcanic substrates, while G. evgoodei thrives in tropical forests and Sinaloan thornscrub with seasonal leaf shed. Microhabitats center on burrow complexes, which excavate to depths of 2–10 m depending on and , providing stable microclimates (15–25°C, higher ) for estivation, , and refuge from predators and extremes. Selection favors burrow entrances in ecotones with 20–40% canopy cover, high availability (especially for juveniles preferring forbs over grasses), and proximity to sources like seasonal washes. In denser habitats like thornscrub, individuals cluster burrows in clearings to maximize solar exposure and access, with viability tied to herbaceous density exceeding 30%. Natural shelters, such as caves for desert , supplement self-dug burrows where soils are compacted.

Ecology and Behavior

Diet and Foraging

Species of the genus Gopherus are primarily herbivorous, with diets dominated by grasses (), forbs, annual wildflowers, and succulents such as cacti, reflecting adaptations to xeric habitats where plant availability fluctuates seasonally. Grasses often form a substantial portion, comprising up to 60% in some species like the Bolson tortoise (G. flavomarginatus), alongside halophytic species such as Hilaria mutica and various forbs. Desert-adapted species, including G. agassizii and G. morafkai, prioritize native annuals, perennial grasses, and high-calcium plants like mallows and desert vines, while eastern species such as G. polyphemus favor wiregrass (Aristida spp.), broadleaf grasses, legumes (), and forbs like Florida pusley. Foraging behavior is selective rather than opportunistic, with exhibiting non-random plant choices to optimize , including for , water from plant moisture, and minerals while minimizing excess accumulation. Juveniles of G. consume fewer grasses than adults, potentially prioritizing softer forbs for growth. Activity peaks in spring and summer mornings or evenings, when emerge from burrows to within 100-200 meters, though G. may traverse larger distances in late summer droughts to access scarce . The tortoise (G. berlandieri) shows slight omnivory, incorporating , snails, and bones alongside grasses, herbs, and prickly pear pads, fruits, and flowers. Diet composition shifts with : spring emphasizes emerging annuals and flowers for hydration and support, while dry periods rely on dry grasses and perennials. Opportunistic intake of fungi, lichens, or carrion occurs rarely across species, aiding gut or mineral supplementation but not exceeding 5% of intake. Limited data for G. evgoodei indicate similarity to congeners, with tied to annual abundance in thornscrub. Selective pressure favors plants high in during growth phases, evidenced by fecal analyses showing overrepresentation of preferred taxa relative to availability.

Reproduction and Life History

Gopherus tortoises display a K-selected life history strategy, marked by slow growth, delayed , low annual , and prolonged adult lifespan, adaptations suited to arid and semi-arid environments with unpredictable resources. Females typically reach reproductive maturity between 10 and 26 years of age, varying by species and population; for instance, G. berlandieri matures around 15 years, while Sonoran G. morafkai females require 22–26 years. Males often mature slightly earlier than females across species. Mating is seasonal, generally occurring in spring after tortoises emerge from brumation, with behaviors including male chin-dragging, of rivals or females, and mounting attempts that can last several minutes. In G. agassizii, females may store viable for multiple years, enabling delayed fertilization and egg production without annual remating. Nesting follows in late spring to early summer, with females excavating shallow flasks-shaped nests near entrances; frequency is usually one per season, though up to two occurs in some populations like G. agassizii and G. berlandieri. Clutch sizes range from 2–9 eggs across the , reflecting body size and environmental constraints: G. polyphemus averages 6 eggs (range 5–9), G. agassizii and G. morafkai 2–7, and G. berlandieri about 3. Eggs incubate for 80–110 days, influenced by soil and , with shorter periods in warmer southern ranges; sex determination is -dependent, producing more females at higher incubation temperatures. Hatchlings emerge small (3–5 cm length) and independent, facing 90–98% mortality in early life stages due to predation, , and . Post-hatching growth is gradual, with juveniles remaining burrow-dependent for years; adults exhibit but slower rates after maturity. Lifespans exceed 50 years in the wild, with records up to 80–100 years for G. agassizii and potentially 60 for G. berlandieri, though actual longevity is limited by extrinsic threats rather than . Annual reproductive output remains low, with lifetime fecundity constrained by biennial or irregular breeding in some females and high nest failure rates (often >80% from predation). This strategy prioritizes survival over rapid population growth, rendering populations vulnerable to perturbations.

Burrowing and Social Interactions

Species of the Gopherus construct extensive burrows essential for survival, , and predator avoidance, with tunnels typically averaging 4.5 meters in length and 2 meters in depth for G. , though some reach up to 12 meters long and 3 meters deep. These burrows maintain stable internal conditions, including higher humidity and moderated temperatures year-round, shielding occupants from surface extremes like fire and desiccation. Excavation occurs primarily with powerful forelimbs, producing distinctive fan-shaped aprons of displaced at entrances, and tortoises may dig multiple burrows over time, shifting occupancy based on seasonal activity. In G. agassizii, burrows support prolonged periods of up to nine months, with peak activity from March to June and September to October. While Gopherus exhibit primarily solitary habits, they form loose aggregations of with overlapping home ranges, enabling periodic social contacts. Interactions include agonistic displays, rituals, and occasional burrow sharing, more common between opposite-sex individuals than same-sex pairs, which display greater intolerance. dominance behaviors influence burrow preferences and movements, with and mental secretions playing roles in mate attraction and territorial disputes. Hatchlings and juveniles show and apparent competition for burrows, suggesting affect early survival beyond initial independence. Vocalizations have been documented in social contexts, marking a departure from the typical asocial profile of many species.

Human Interactions and Uses

Historical Exploitation

Human exploitation of Gopherus species dates to prehistoric times, primarily involving consumption as food, collection for the pet trade, and utilization of shells for tools and cultural items. Native American groups across the consumed desert tortoises (G. agassizii) and fashioned their carapaces and plastrons into bowls, scrapers, rattles, and ceremonial drums, while some tribes like the kept them as pets symbolizing patience and survival. These practices did not appear to cause significant population declines prior to European settlement. For the gopher tortoise (G. polyphemus), historical harvest for meat persisted into the 20th century, particularly in north-central , where it was valued despite the small portion relative to the animal's size. Hunters targeted both sexes indiscriminately, with size distributions reflecting those in natural colonies, and cultural traditions among certain communities perpetuated its use as a source. Such predation was generally light and had limited impact on populations, though intensive localized exploitation posed risks given the species' low reproductive rate. Direct consumption influenced populations across portions of its range, contributing to declines alongside habitat loss. The tortoise (G. berlandieri) faced heavy exploitation by suppliers starting in the mid-, exacerbating declines due to its slow reproduction; this prompted Texas legislation in 1967 restricting collection to protect remaining populations. Similarly, desert tortoises were collected en masse for the pet trade and food by settlers from the early , with selling them as souvenirs until prohibited sales in 1939 and further protections in 1961. The Bolson tortoise (G. flavomarginatus) in endured ongoing exploitation for food, compounding alterations and restricting its range. These activities, driven by local demand rather than commercial scale, preceded modern conservation but set precedents for regulatory responses as populations waned.

Current Conflicts

In , rapid urbanization has intensified conflicts between development projects and gopher (G. polyphemus), necessitating permits for relocation from construction sites, with high demand overwhelming available recipient habitats. As of June 2025, a proposed neighborhood threatened to displace nearly 300 tortoises from approximately 600 burrows, highlighting ongoing tensions despite state requirements for . The Fish and Wildlife Conservation Commission reports that from such activities remains the primary driver, exacerbating population declines without federal endangered status. For tortoises (G. agassizii), expansion in the creates direct conflicts, with utility-scale solar facilities converting over 18,000 acres of critical tortoise range since the early 2010s. A January 2025 approval for a solar project 38 miles west of proceeded despite translocation efforts and documented impacts on threatened populations, as required by the U.S. Fish and Wildlife Service. These developments fragment migration corridors and increase vulnerability to secondary stressors like predation and disease, though proponents argue for compatible siting on already-disturbed lands. Military training and off-road vehicle use further compound conflicts for desert tortoises, with ongoing activities on federal lands exposing populations to soil contamination and direct mortality; a 2024 study linked elevated metal levels in tortoises to such disturbances in the Mojave. Across the genus, roadkill from expanding infrastructure affects multiple species, including Texas tortoises (G. berlandieri), though data remain limited for less-studied taxa like the Bolson tortoise (G. flavomarginatus).

Conservation

Population Status

The genus Gopherus encompasses six extant of North American tortoises, several of which have undergone significant population declines driven primarily by habitat loss and fragmentation, though status varies by . Overall, empirical monitoring indicates patchy distributions with low densities in many areas, reflecting historical range contractions; for instance, pre-European settlement ranges exceeded current extents by factors of 2–5 times for like G. polyphemus and G. agassizii, based on and soil burrowing evidence correlated with modern surveys. The eastern gopher tortoise () is classified as Vulnerable by the IUCN, with populations estimated to have declined by approximately 80% over the past century across its southeastern U.S. range from to . Densities typically range from 1–20 s per in core habitats, but viability analyses project 1–3% annual declines in fragmented areas without intervention, supported by long-term mark-recapture from protected lands showing reduced and increased mortality. In alone, where over 80% of remaining tortoises occur, upland habitats supporting populations have shrunk by more than 80% since the mid-20th century. The Mojave desert tortoise (G. agassizii) holds Critically Endangered status under IUCN criteria, with range-wide declining sharply since the 1980s; monitoring plots document reductions exceeding 50% in many sites, attributed to observed mortality rates outpacing . In the Mojave (north and west of the ), adult densities often fall below 5 per square kilometer, with 75–95% of averaging fewer than 50 adults per square kilometer in eastern Mojave areas of , , and . Patchy distributions persist at 0–200 individuals per square mile, but sustained trends from 2004–2014 transect surveys confirm ongoing decreases in abundance. The tortoise (G. morafkai) exhibits more stable demographics, with an estimated range exceeding 200,000 km² and habitat over 98,000 km² supporting viable populations per IUCN assessments; however, localized declines occur in fragmented zones. The tortoise (G. berlandieri) is rated Least Concern globally by IUCN, with densities varying from 0.2 to 122 per hectare in southern Texas thornscrub, indicating relative stability despite state-level threats. Goode's thornscrub tortoise (G. evgoodei) is Vulnerable, confined to limited thornscrub in and , , where small range and habitat pressures contribute to inferred declines, though quantitative data remain sparse. The Bolsón tortoise (G. flavomarginatus), restricted to arid grasslands in , numbers fewer than 2,500 wild individuals and is Critically Endangered, with prehistoric ranges reduced by over 90% based on burrow density correlations and surveys; has yielded over 840 hatchlings since the 1980s, but wild recruitment remains low. Across the genus, adult and subadult tortoises dominate surviving populations, underscoring recruitment bottlenecks in declining groups.

Primary Threats

The primary threats to species within the Gopherus stem from anthropogenic habitat alteration, including destruction, fragmentation, and degradation, which disrupt the open, well-drained sandy essential for burrowing and foraging. and residential development have historically reduced suitable habitats across the range of G. polyphemus (), with silvicultural practices and conversion to agriculture exacerbating fragmentation in the . For G. agassizii () in the Mojave and Sonoran Deserts, human land uses such as activity and directly degrade creosote bush-dominated ecosystems, while intensified by climate variability compounds water scarcity and physiological stress. Direct human impacts include illegal collection for the pet trade and during development, which often results in high mortality due to stress and disease transmission; upper respiratory tract disease (URTD), caused by agassizii, has decimated populations of G. agassizii since the 1990s, with prevalence rates exceeding 50% in some areas. Vehicle strikes pose a persistent mortality risk, particularly for G. polyphemus crossing roads in fragmented landscapes, where annual estimates reach thousands in alone. Predation on eggs and juveniles by subsidized predators like raccoons and fire ants, amplified by changes, further suppresses across . In , species such as G. flavomarginatus () and G. evgoodei face acute pressures from by cattle, mining operations, and , which have reduced intact to less than 4% of historical extent in regions like Mapimí Biosphere Reserve. Climate change projections indicate increased aridity and temperature extremes may elevate extinction risks for arid-adapted taxa like G. agassizii and G. morafkai, though empirical data on genus-wide responses remain limited. These threats interact synergistically, with habitat loss facilitating disease spread and invasive predators, underscoring the need for integrated .

Conservation Measures and Outcomes

Conservation measures for Gopherus species emphasize habitat protection, legal safeguards, translocation efforts, and disease mitigation, implemented primarily through federal, state, and international programs. In the United States, the Mojave population of the (G. agassizii) has been listed as threatened under the Endangered Species Act since 1990, prompting recovery plans that include habitat acquisition, restoration of native vegetation, and predator control. The U.S. Fish and Wildlife Service's 2011 revised recovery plan delineates delisting criteria based on population viability in designated recovery units, with actions such as to reduce mortality and head-start programs for juveniles. For the (G. polyphemus), state-level protections classify it as threatened across its range, supplemented by the 2013 Multi-Agency Conservation Strategy that promotes restoration and burrow relocations during development. The Natural Resources Conservation Service's Working Lands for Wildlife program has conserved over 278,000 acres of suitable habitat since 2012 through easements and prescribed burns. Translocation and reintroduction form core interventions, particularly for species facing urban expansion. Desert tortoises are routinely translocated from construction sites to protected areas, guided by protocols updated in to minimize stress and disease transmission, though post-translocation survival rates average 70-80% in monitored cohorts. The (G. flavomarginatus), listed as vulnerable by the IUCN, benefits from reintroduction programs in Mexico's Mapimí Biosphere Reserve, where over 1,000 individuals have been released since the from at facilities like the Durango Zoo, coupled with 43,000-acre ranch acquisitions for security. The tortoise (G. berlandieri), state-listed as threatened since 1977, receives protection via prohibitions on collection and transport, with monitoring in national parks revealing stable densities in thornscrub remnants but emphasizing patrols. tortoises (G. morafkai) are addressed through candidate conservation agreements since 2015, focusing on voluntary on private lands. Outcomes vary by species, reflecting differential threat intensities and intervention efficacy. Gopher tortoise populations in the eastern segment stabilized sufficiently by 2022 to avert federal listing, with Georgia's initiative securing 64 viable populations—nearing a 65-population goal—and protections exceeding 100,000 acres, attributed to collaborative practices that integrate tortoise needs. However, recovery lags, with 2022 assessments indicating persistent declines in key units due to upper and inadequate connectivity, necessitating calls for intensified translocation and a dedicated recovery office. efforts show promise through Turner Fund releases establishing self-sustaining groups on U.S.- borderlands, though overall numbers remain critically low at under 10,000 wild individuals. tortoise status holds steady in protected areas, but statewide fragmentation continues to fragment populations, with vehicle strikes documented as a leading mortality factor absent broader corridor initiatives. Across the , monitoring underscores that while legal and measures curb immediate losses, long-term viability hinges on addressing chronic stressors like and climate-driven .

References

  1. https://ielc.libguides.com/sdzg/factsheets/deserttortoise/taxonomy
  2. https://www.oriannesociety.org/priority-species/gopher-tortoise/
  3. https://www.csub.edu/~dgermano/NATortLifeHist.pdf
  4. https://www.fws.gov/species/sonoran-desert-tortoise-gopherus-morafkai
  5. https://www.fws.gov/species/bolson-tortoise-gopherus-flavomarginatus
  6. https://www.fs.usda.gov/database/feis/animals/reptile/gopo/all.html
  7. https://www.floridamuseum.ufl.edu/files/5314/7172/3593/Vol-20-No-3.PDF
  8. https://pmc.ncbi.nlm.nih.gov/articles/PMC4449762/
  9. https://myfwc.com/wildlifehabitats/profiles/reptiles/gopher-tortoise/
  10. https://www.nature.org/en-us/get-involved/how-to-help/animals-we-protect/gopher-tortoise/
  11. https://www.blm.gov/sites/blm.gov/files/documents/Nevada_SNDO_Desert_Tortoise_Fact_Sheet_0.pdf
  12. https://www.fws.gov/project/gopher-tortoise
  13. https://nri.tamu.edu/programs/natural-resource-conservation-policy/understanding-the-keystone-gopher-tortoise/
  14. https://www.iucnredlist.org/species/pdf/12983629
  15. https://explorer.natureserve.org/Taxon/ELEMENT_GLOBAL.2.105196/Gopherus_polyphemus
  16. https://reptile-database.reptarium.cz/species?genus=gopherus&species=berlandieri
  17. https://www.iucnredlist.org/es/search/map?taxonomies=101564&searchType=species
  18. https://tpwd.texas.gov/huntwild/wild/species/txtort/
  19. https://www.fs.usda.gov/database/feis/animals/reptile/goph/all.html
  20. https://tortoise-tracks.org/wp-content/uploads/2021/09/2021-Berry-et-al-IUCN-Red-List.pdf
  21. https://www.usgs.gov/publications/sonoran-desert-tortoise-gopherus-morafkai
  22. https://www.researchgate.net/publication/377002571_Gopherus_morafkai_The_IUCN_Red_List_of_Threatened_Species_2023_eT97246109A97246177
  23. https://iucn-ctsg.org/wp-content/uploads/publications/12_2016_Bolson_Tortoise_USA.pdf
  24. https://natureconservation.pensoft.net/article/11582/
  25. https://reptile-database.reptarium.cz/Gopherus/evgoodei
  26. https://tortoise.org/archives/evgoodei.html
  27. http://novataxa.blogspot.com/2016/02/gopherus-evgoodei.html
  28. https://repositories.lib.utexas.edu/bitstreams/8e82a17a-c911-4480-8b91-f8f4c3fe8e84/download
  29. https://www.floridamuseum.ufl.edu/science/white-river-badlands-prospecting-for-ancient-tortoise-fossils/
  30. https://www.researchgate.net/publication/276920316_A_Fossil_and_Zooarchaeological_History_of_the_Gopher_Tortoise_Gopherus_in_the_Southeastern_United_States
  31. https://digitalcommons.usf.edu/etd/1471/
  32. https://www.floridamuseum.ufl.edu/index.php/download_file/view/2863/1075/
  33. https://www.sciencedirect.com/science/article/abs/pii/S1055790384710360
  34. https://www.sdnhm.org/exhibitions/fossil-mysteries/fossil-field-guide-a-z/tortoise/
  35. https://doc.rero.ch/record/15347/files/PAL_E2686.pdf
  36. https://iucn-tftsg.org/wp-content/uploads/file/Articles/Bramble_1982.pdf
  37. https://www.tandfonline.com/doi/abs/10.1671/0272-4634%25282004%2529024%255B0822%253AANGTOT%255D2.0.CO%253B2
  38. https://onlinelibrary.wiley.com/doi/10.1111/cla.12227
  39. https://www.researchgate.net/publication/317170516_Fossil_Tortoises_of_Southeastern_Arizona_with_an_Earliest_Pleistocene_Range_Expansion_of_Gopherus
  40. https://bioone.org/journalArticle/Download?urlId=10.1894%252F0038-4909-69.1.1
  41. https://www.researchgate.net/publication/318043813_Phylogenetic_Systematics_of_North_American_Tortoises_Genus_Gopherus_Evidence_for_Their_Classification
  42. https://www.fs.usda.gov/rm/pubs_int/int_gtr316.pdf
  43. https://www.fws.gov/sites/default/files/documents/20220913%20Gopher%20Tortoise%20SSA%20Report_508%20compliant.pdf
  44. https://www.csub.edu/~dgermano/ShellMorphNAmTort.pdf
  45. https://bioone.org/journals/herpetologica/volume-65/issue-2/08-029R.1/Patterns-of-Dispersion-and-Burrow-Use-Support-Scramble-Competition-Polygyny/10.1655/08-029R.1.short
  46. https://ielc.libguides.com/sdzg/factsheets/deserttortoise/characteristics
  47. https://animaldiversity.org/accounts/Gopherus_polyphemus/
  48. https://www.jstor.org/stable/3891795
  49. https://pubs.usgs.gov/publication/70208836
  50. https://pmc.ncbi.nlm.nih.gov/articles/PMC9205304/
  51. https://www.osti.gov/servlets/purl/776476
  52. https://cdnsciencepub.com/doi/10.1139/z94-125
  53. https://pmc.ncbi.nlm.nih.gov/articles/PMC11532232/
  54. https://flmnhbulletin.com/index.php/flmnh/article/view/flmnh-vol27-no2
  55. https://fieldguide.wildlife.utah.gov/?species=gopherus%2520agassizii
  56. https://pubs.usgs.gov/publication/70176624
  57. https://www.fws.gov/taxonomic-tree/29437
  58. https://www.fws.gov/species/desert-tortoise-gopherus-agassizii
  59. http://reptile-database.reptarium.cz/Gopherus/evgoodei
  60. https://pmc.ncbi.nlm.nih.gov/articles/PMC4768471/
  61. https://www.fws.gov/sites/default/files/documents/20220913%2520Gopher%2520Tortoise%2520SSA%2520Report_508%2520compliant.pdf
  62. https://www.aces.edu/blog/topics/natural-resources-urban/gopher-tortoise-ecology-and-conservation/
  63. https://www.federalregister.gov/documents/2011/07/27/2011-18856/endangered-and-threatened-wildlife-and-plants-12-month-finding-on-a-petition-to-list-the-gopher
  64. https://downloads.regulations.gov/FWS-R2-ES-2021-0153-0004/content.pdf
  65. https://ecos.fws.gov/docs/candidate/assessments/2015/r4/C044_V02.pdf
  66. https://pmc.ncbi.nlm.nih.gov/articles/PMC11788540/
  67. https://www.biotaxa.org/hn/article/view/85883/81863
  68. https://animaldiversity.org/accounts/Gopherus_flavomarginatus/
  69. https://www.turtleconservancy.org/programs/goodes-thornscrub-tortoise
  70. https://apps.azdot.gov/ADOTLibrary/publications/project_reports/PDF/AZ650.pdf
  71. https://digitalcommons.usf.edu/context/etd/article/3335/viewcontent/SFE0002255.pdf
  72. https://pmc.ncbi.nlm.nih.gov/articles/PMC3221657/
  73. https://downloads.regulations.gov/FWS-HQ-ES-2021-0156-0003/content.pdf
  74. https://pmc.ncbi.nlm.nih.gov/articles/PMC4312072/
  75. https://explorer.natureserve.org/Taxon/ELEMENT_GLOBAL.2.102195/Gopherus_morafkai
  76. https://ielc.libguides.com/sdzg/factsheets/deserttortoise/diet
  77. https://meridian.allenpress.com/herpetologica/article/59/4/475/32506/DIET-AND-DIETARY-PREFERENCE-OF-THE-JUVENILE-GOPHER
  78. https://turtles.linnaeus.naturalis.nl/linnaeus_ng/app/views/species/taxon.php?id=8186&epi=11
  79. http://treatment.plazi.org/id/020E41BB5516460A8D0FE8B48052AD38
  80. https://digitalcommons.usf.edu/etd/8709/
  81. https://www.sciencedirect.com/science/article/abs/pii/S014019630800356X
  82. https://meridian.allenpress.com/herpetological-monographs/article-abstract/32/1/34/188831/Reproductive-Ecology-and-Life-History-of-Female
  83. https://digitalscholarship.unlv.edu/cgi/viewcontent.cgi?article=1955&context=rtds
  84. https://ielc.libguides.com/sdzg/factsheets/deserttortoise/reproduction
  85. https://www.fws.gov/sites/default/files/documents/Rostal%2520et%2520al.1994.Seasonal%2520repro%2520cycle%2520of%2520the%2520DT.pdf
  86. https://tpwd.texas.gov/huntwild/wild/wildlife_diversity/habitat_assessment/media/TexasTortoise_brochure_english.pdf
  87. https://www.nps.gov/moja/learn/nature/desert-tortoise.htm
  88. https://www.researchgate.net/publication/236981913_The_Reproductive_Biology_of_Gopherus_polyphemus_Chelonia_Testudinidae
  89. https://animaldiversity.org/accounts/Gopherus_agassizii/
  90. https://esajournals.onlinelibrary.wiley.com/doi/abs/10.1890/0012-9658%25282000%2529081%255B1297%253AVITLHD%255D2.0.CO%253B2
  91. https://edis.ifas.ufl.edu/publication/UW295
  92. https://wildlife.onlinelibrary.wiley.com/doi/abs/10.1002/jwmg.70020
  93. https://pubmed.ncbi.nlm.nih.gov/33421529/
  94. https://talltimbers.org/wp-content/uploads/2019/01/Aggression_Radzioetal2016.pdf
  95. https://www.wildlifeacoustics.com/customer-stories/finding-social-vocalization-in-gopher-tortoises
  96. https://mojaveproject.org/dispatches-item/gopherus-agassizii/
  97. https://flmnhbulletin.com/index.php/flmnh/article/view/flmnh-vol28-no4
  98. https://www.depts.ttu.edu/nsrl/publications/downloads/op196.pdf
  99. https://tortoise.org/archives/bols-tort.html
  100. https://www.tcpalm.com/story/news/local/indian-river-lagoon/2025/06/17/florida-gopher-tortoise-relocations-increase-amid-development-boom-keystone-species/81203825007/
  101. https://nevadacurrent.com/2024/03/21/solar-power-project-threatens-prime-desert-tortoise-habitat-conservationists-warn/
  102. https://www.facebook.com/groups/i.am.ag/posts/1869764913590824/
  103. https://www.theguardian.com/us-news/2023/may/21/solar-farms-energy-power-california-mojave-desert
  104. https://www.frontiersin.org/journals/veterinary-science/articles/10.3389/fvets.2024.1481367/full
  105. https://www.nature.org/en-us/get-involved/how-to-help/animals-we-protect/desert-tortoise/
  106. https://www.herpconbio.org/Volume_13/Issue_2/Allison_McLuckie_2018.pdf
  107. https://www.usgs.gov/publications/contrasting-patterns-demography-and-population-viability-among-gopher-tortoise
  108. https://www.sciencedirect.com/science/article/abs/pii/S0006320705003824
  109. https://ielc.libguides.com/sdzg/factsheets/deserttortoise/population
  110. https://explorer.natureserve.org/Taxon/ELEMENT_GLOBAL.2.102027/Gopherus_agassizii
  111. https://explorer.natureserve.org/Taxon/ELEMENT_GLOBAL.2.105830/Gopherus_berlandieri
  112. https://colossalfoundation.org/project/bolsontortoise/
  113. https://tesf.org/project/bolson-tortoise/
  114. https://www.federalregister.gov/documents/2022/10/12/2022-21659/endangered-and-threatened-wildlife-and-plants-finding-for-the-gopher-tortoise-eastern-and-western
  115. https://www.sciencedirect.com/science/article/pii/S0960982220306369
  116. https://tucsonherpsociety.org/projects/mexican-tortoise-project/
  117. https://ecos.fws.gov/docs/recovery_plan/RRP%2520for%2520the%2520Mojave%2520Desert%2520Tortoise%2520-%2520May%25202011_1.pdf
  118. https://www.fws.gov/press-release/2022-10/us-fish-and-wildlife-service-completes-gopher-tortoise-review
  119. https://www.nrcs.usda.gov/programs-initiatives/working-lands-for-wildlife/gopher-tortoise
  120. https://pubs.usgs.gov/publication/sir20245092/full
  121. https://www.turtleconservancy.org/programs/bolson-tortoise-ecosystem-preserve
  122. https://www.rainforesttrust.org/urgent-projects/land-purchase-for-the-vulnerable-bolson-tortoise-in-mexico/
  123. https://www.nps.gov/im/guln/texas-tortoise.htm
  124. https://downloads.regulations.gov/FWS-R2-ES-2021-0153-0006/attachment_6.pdf
  125. https://gophertortoisecouncil.org/gtc-newsletter/56-volume-44-number-3/265-2024-gopher-tortoise-council-state-reports
  126. https://georgiaconservancy.org/gophertortoise/
  127. https://www.govinfo.gov/content/pkg/GOVPUB-I49-PURL-gpo80914/pdf/GOVPUB-I49-PURL-gpo80914.pdf
  128. https://www.fws.gov/story/2023-12/how-gertie-bolson-tortoise-led-her-species-recovery-part-one
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