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Blesbok
Blesbok
Blesbok
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Blesbok
At Krugersdorp Game Reserve
Scientific classification Edit this classification
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Artiodactyla
Family: Bovidae
Subfamily: Alcelaphinae
Genus: Damaliscus
Species:
D. pygargus
Subspecies:
D. p. phillipsi
Trinomial name
Damaliscus pygargus phillipsi
Harper, 1939
Synonyms

Damaliscus dorcas phillipsi

The blesbok or blesbuck (Damaliscus pygargus phillipsi) is a subspecies of the bontebok antelope endemic to South Africa, Eswatini and Namibia. It has a distinctive white face and forehead, which inspired the name because bles is the Afrikaans (and Dutch language) word for a blaze such as one might see on the forehead of a horse.

Taxonomy

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The blesbok and the bontebok (D. p. pygargus) are subspecies of the same species and can readily interbreed, the hybrid offspring being known as the bontebles or baster blesbok; the differences between the two subspecies have arisen due to preferences for different habitats in the wild.

Distribution

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The blesbok is endemic to southern Africa and is found in large numbers in all national parks with open grasslands, from the Highveld north of the Vaal River southwards through the Free State, to the Eastern Cape. It is a plains species and dislikes wooded areas. It was first described in the 17th century in bountiful herds.[2]

Physical description

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adult
juvenile

Physically, rams and ewes are remarkably similar. Their mass can be as much as 85 kg. A characteristic of the blesbok is the prominent white blaze on the face and a horizontal brown strip that divides this blaze above the eyes. The body is brown with a lighter-coloured saddle on the back and the rump an even lighter shade. The legs are brown, with a white patch behind the top part of the front legs. Lower legs whitish. Both sexes carry horns, ringed almost to the tip. Female horns are slightly more slender. The neck and the top of the back of the blesbok are brown. Lower down on the flanks and buttocks, the coloring becomes darker. The belly, the inside of the buttocks, and the area up to the base of the tail is white. Blesbok can be easily differentiated from other antelopes because they have a distinct white face and forehead. The blesbok differs from the bontebok by having less white on the coat and the blaze on the face, which is usually divided; the coat is also a lighter yellow than the bontebok. The length of their horns averages at around 38 cm. Male adult blesbok average around 70 kg; females average lower, at around 61 kg.[3]

  • Body length: 140–160 cm (4.6–5.2 ft)
  • Shoulder height: 85–100 cm (2.79–3.28 ft)
  • Tail length: 30–45 cm (12–18 in)
  • Weight: 55–80 kg (121–176 lb)[4]

Habitat

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Blesbok can be found in open veld or plains of South Africa, Eswatini and Namibia. Their preferred habitat is open grassland with water. They often occupy relatively small territories of 2.5 to 6.0 acres in size. They were once one of the most abundant antelope species of the African plains but have become scarce since 1893 due to relentless poaching for their skins and meat. Trophy hunting has helped the blesbok to survive and thrive in the areas where they are hunted legally.

Reproduction

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The blesbok is a seasonal breeder, with rutting from March to May. Births peak during November and December after a gestation period of about 240 days (8 months). Females give birth to a single calf per breeding season.[5]

Status

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The blesbok was hunted nearly to extinction because of its large numbers, but having been protected since the late 19th century, it has proliferated. Today, it is sufficiently numerous not to be classed as endangered. In modern times, this is largely because of the commercial value of the blesbok to private landowners and because it is one of the few medium-sized antelopes that can be contained by normal stock fencing.[6] As of 2017, blesbok numbers have had an upward trend, and are estimated to be at least 54,000, with about 69% of these thought to be genetically pure.[1] There are at least 17,000 in protected areas.[1] The principal threat is thought to be hybridization with the bontebok.[1]

Predators and threats

[edit]
Blesbok in captivity at Copenhagen Zoo, Denmark

Lions, leopards, African wild dogs, spotted hyenas, cheetahs and humans are the blesbok's main predators, while jackals, eagles, and potentially rock pythons and monitor lizards may take unattended calves. Nile crocodiles will catch blesbok opportunistically, if they come to drink at bodies of water where crocodiles reside, or attempt to cross rivers with crocodiles in them.

The blesbok is also farmed and hunted for its skin, meat and for trophies. Blesbok are shy and alert; they rely on speed and endurance to escape predators but tend to return to where they were attacked after a few minutes. When chased, they can maintain a speed of 70 km/h (43 mph) but, like other white-fronted damalisques, blesbok are not good jumpers. They are, however, very good at crawling under things.

Paleontology

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Fossil remains of a prehistoric relative, Damaliscus niro, were found in deposits in Sterkfontein. With a weight of approximately 120 kg, it was heavier than the modern blesbok and had slightly different horns. D. niro became extinct at the end of the Pleistocene 12,000 years ago.[7]

References

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[edit]
Revisions and contributorsEdit on WikipediaRead on Wikipedia

Blesbok

View on Grokipedia
from Grokipedia
The blesbok (Damaliscus pygargus phillipsi) is a medium-sized of endemic to the grasslands of , distinguished by its reddish-brown coat, a prominent white facial blaze extending from the horns to the muzzle (interrupted by a horizontal brown stripe above the eyes), and slender, S-shaped horns in both sexes that curve backward and inward. Adults typically measure 140–160 cm in head-body length, stand 85–100 cm at the shoulder, and weigh 55–80 kg, with males slightly larger than females. Native to the region, it prefers open, short-grass savannas and is adapted for speed and endurance as a diurnal grazer. Historically, the blesbok nearly went extinct in the due to overhunting and loss, with populations dropping to fewer than 2,000 individuals by the early , but conservation efforts including protected areas and private ranching have led to a remarkable recovery. As of 2016, the population was estimated at over 77,000 individuals (based on 2010–2016 data), with about 70% mature, distributed across formal reserves, private lands, and translocated populations in neighboring countries like , , and . It is classified as Least Concern by regional assessments, though challenges persist from hybridization with the closely related and for color variants that may erode . Socially gregarious, blesbok form herds of 15–100 individuals that vary seasonally, with territorial males defending areas using scent marking via dung heaps and horn displays during the –May rutting . They are selective feeders on grasses, favoring recently burned or grazed areas for fresh shoots, and require access to water sources within 5–10 km. Females give birth to a single calf after a of about 240 days, typically between August and January, with young reaching sexual maturity at 2–3 years.

Taxonomy and Evolution

Taxonomy

The blesbok (Damaliscus pygargus phillipsi) is classified within the kingdom Animalia, phylum Chordata, class Mammalia, order Artiodactyla, family , subfamily , and Alcelaphini. It belongs to the genus Damaliscus and is recognized as a of the species complex (D. pygargus), which encompasses two main : the blesbok (D. p. phillipsi) and the (D. p. pygargus). This placement reflects its evolutionary ties to other African grazing antelopes in the Alcelaphini , characterized by adaptations for open grassland habitats. The blesbok is distinguished from the bontebok (D. p. pygargus) primarily by its lighter brown coat and less pronounced white facial markings, although both share a prominent white blaze on the face. Taxonomic concerns arise from the potential for hybridization between these subspecies, particularly in areas where their ranges overlap or through human-mediated translocations, which can blur genetic distinctions and complicate conservation efforts. Such interbreeding has historically led to debates over subspecies boundaries, with earlier classifications sometimes placing the blesbok under Damaliscus dorcas phillipsi before consensus shifted to the current D. pygargus framework. The blesbok subspecies was formally named Damaliscus pygargus phillipsi by Francis Harper in 1939, honoring the American sportsman and conservationist John C. Phillips who collected specimens in . The common name "blesbok" derives from , where "bles" refers to a blaze—a white marking on the face, akin to that on a —and "bok" means or buck. This etymology highlights the species' most striking visual feature, which has been central to its identification since early European accounts.

Paleontology

The Alcelaphini tribe, to which the blesbok belongs, traces its origins to the Middle Miocene epoch, with explosive radiations occurring between approximately 12 and 15 million years ago, marking the diversification of key bovid lineages adapted to emerging open habitats. This early evolutionary phase laid the foundation for grassland-specialized antelopes, as evidenced by fossil records indicating the tribe's monophyletic emergence in Africa during the to early transition. A significant extinct relative of the modern blesbok (Damaliscus pygargus) is Damaliscus niro, a characterized by robust horn cores with upright insertions and posterior curvature, morphologically akin to blesbok but distinguished by larger size. D. niro persisted in through the , with fossils dated to between 89,000 and 60,000 years before present, before its , likely linked to shifts at the Pleistocene-Holocene boundary. This is regarded as a direct or close precursor to the blesbok, sharing dietary and locomotor traits suited to arid grasslands. Evolutionary adaptations in D. niro and early blesbok lineages included the development of hypsodont dentition and limb morphology optimized for high-speed grazing in open C4-dominated grasslands, driven by Pleistocene climate fluctuations that expanded arid environments across from the Middle Pleistocene onward (approximately 773,000 to 12,000 years ago). Stable isotope analyses of fossils confirm a specialized C4 grass diet (δ¹³C values around -3.0‰), reflecting niche specialization amid and drying trends that favored proliferation. Primary fossil discoveries of blesbok ancestors, including D. niro, come from South African sites such as Wonderwerk Cave in the Northern Cape, where Middle to Late Pleistocene deposits (150,000–240,000 years old) preserve horn fragments and postcrania indicating open-savanna adaptations, and the open-air locality of Florisbad in the Free State (100,000–400,000 years old), which yields remains alongside evidence of wetland-grassland mosaics. These sites highlight the Florisian Land Mammal Age's role in documenting the transition to modern alcelaphine forms.

Physical Characteristics

Appearance

The blesbok exhibits a distinctive coloration consisting of a reddish-brown body, which provides a subtle contrast against its habitats. A prominent white blaze marks the face, extending from below the horns to the muzzle and often interrupted by a narrow horizontal brown stripe above the eyes. This facial patterning is a key identifying feature, with the itself appearing dark brown to black, enhancing the stark visual contrast. Complementing these traits, both sexes bear S-shaped horns that are heavily ringed with prominent ridges nearly to the tips, though female horns tend to be slightly more slender and curve backward and then inward. The lower legs feature striking white markings, known as "," that sharply delineate from the darker body coat, contributing to the animal's overall elegant . A notable variation is the white-phase blesbok, a leucistic form characterized by a near-white coat due to reduced pigmentation from a recessive ; this morph is rare in but has been selectively bred in , resulting in populations with this atypical coloration.

Size and Build

The blesbok exhibits a medium-sized build typical of alcelaphine antelopes, with a shoulder height ranging from 85 to 100 cm and a head-body length of 140 to 160 cm. Adults weigh between 55 and 80 kg, with males averaging heavier at 65 to 80 kg compared to 55 to 70 kg for females. The overall frame is slender and agile, featuring a higher than rump, a short black-tufted measuring 30 to 45 cm, and rounded ears, adaptations suited to rapid movement across open grasslands. Both sexes bear S-shaped horns that emerge from a prominent on the , curving backward and then inward; these reach up to 38 to 50 cm in males but are shorter and thinner in females. is pronounced in body size and structure, with males larger overall and developing thicker necks and more robust forequarters as they mature, while females maintain a more gracile form.

Habitat and Distribution

Habitat Preferences

The blesbok (Damaliscus pygargus phillipsi) prefers open grasslands, particularly the plateau grasslands of the , characterized by short to medium grasses that support its grazing habits. These ecosystems typically feature a mix of sweet and sour grasses, with marginal suitability in open savannas and woodlands where shade is available in warmer regions. The avoids dense bushveld, forests, thickets, tall grass stands, steep slopes, and rocky areas, as these limit visibility and access to preferred . Access to surface water is a critical requirement, with blesbok being obligate drinkers that typically consume water daily or every second day, remaining in proximity to sources to meet this need. They thrive in mesic grasslands receiving 400–800 mm of annual rainfall, on sandy soils that facilitate the growth of dominant vegetation such as Themeda triandra, Eragrostis curvula, and Setaria nigrirostris. Elevations between approximately 900 and 2,000 m above sea level align with their optimal conditions on highveld plains and mountain plateaus. Blesbok exhibit grazing specializations suited to open habitats, selectively on short grasses under 6–15 cm in height, often favoring freshly burnt areas for nutrient-rich regrowth. They undertake seasonal movements toward greener pastures following spring rains to recover body condition after winter declines in grass quality, enhancing their adaptation to fluctuating open resources.

Geographic Range

The blesbok (Damaliscus pygargus phillipsi) is endemic to southern Africa, with its native range centered in South Africa, particularly the Highveld grasslands of the Free State, Gauteng, and northwestern KwaZulu-Natal provinces, as well as parts of the Karoo in the Eastern and Northern Cape. Populations were historically present in Lesotho and Eswatini (formerly Swaziland), though the species became extinct in Lesotho before 1900 and was extirpated from parts of Eswatini by the early 20th century. Historically, blesbok were widespread across the open grasslands of the , occurring in countless thousands during the mid-19th century, but intensive for meat and hides, combined with conversion for , reduced their numbers by over 99% to fewer than 2,000 individuals by the early . This drastic decline confined surviving populations to isolated pockets in , primarily in the Free State and . Following near-extinction, conservation efforts initiated in the through game ranching and translocation programs in successfully reestablished blesbok across their former range and beyond, with introductions to over 600 protected areas and private ranches by the 2010s. The species has also been reintroduced to and , and extralimital populations now occur in , , and . As of 2016, estimates place the total population at a minimum of 77,751 individuals (including at least 54,426 mature animals), predominantly on private land in , with ongoing translocations contributing to range expansion.

Behavior and Ecology

Social Structure and Diet

Blesbok exhibit a gregarious characterized by distinct group types that vary seasonally. Territorial adult males establish and defend small, mosaic-like territories, typically groups of up to 25 females and their calves into these areas year-round, particularly during the rut from March to May. Female-calf herds form the core family units, often numbering 15 to 25 individuals, while subadult and non-territorial males congregate in bachelor groups that can grow large during the autumn rut. In winter, these groups may merge into larger mixed-sex aggregations of up to 100 individuals to facilitate across broader ranges. Blesbok are diurnal, with peak activity occurring at dawn and , when they graze actively before resting during the . They often orient themselves in herds facing the sun for and maintain vigilance through grunting or snorting alarm calls to alert the group to potential threats. As strict herbivores, blesbok are specialized grazers, deriving nearly their entire diet from graminoids, with up to 94% consisting of C4 grasses such as , Eragrostis curvula, and Chloris species. They show a strong preference for short, fresh green grasses that emerge after burns, which provide higher nutritional quality. Water-dependent, blesbok drink daily and require reliable access to sources, limiting their distribution in arid areas. Foraging patterns are selective, focusing on nutrient-rich patches in the when grass quality is high, but become broader during the as they exploit available medium-height grasses to meet energy needs. is minimal, comprising less than 5% of intake, and occurs only opportunistically on forbs or shrubs when grasses are scarce.

Reproduction

The blesbok is a , with the rut occurring from March to May during autumn in the , a period often aligned with increased rainfall that enhances nutritional resources for impending and . This timing ensures that births coincide with the more abundant summer following the rainy season. The is polygynous, characterized by males establishing and defending small territories through ritualized displays, including vocalizations, posturing, and aggressive interactions such as horn clashes with rivals to secure access to multiple females. Territorial males mark their domains with dung middens and actively herd receptive females, though females may move between territories. Gestation lasts approximately 240 days, after which females typically give birth to a single calf weighing 6–7 kg, though twins occur rarely. Births peak from November to January, with newborns capable of standing and running within minutes, allowing them to remain close to the mother amid the herd. Maternal care involves the calf for up to 6 months, during which the young remains dependent on the before fully integrating into nursery groups. Calves briefly stay near the post-birth but join the herd dynamics within 2–3 weeks as they gain mobility and coordination. Females reach at 1.5–2 years, while males do so at 2–3 years, enabling participation in subsequent breeding cycles.

Conservation and Threats

Conservation Status

The blesbok (Damaliscus pygargus phillipsi) is classified as Least Concern on the regional Red List (South African National Biodiversity Institute assessment, 2016), reflecting a stable population estimated at 77,751 individuals (2010–2016 counts), of which approximately 54,426 are mature, across its range. This status indicates no immediate threat to the subspecies' survival, with populations showing resilience through ongoing conservation measures. Historically, the blesbok suffered a drastic decline, nearing by the due to widespread for , hides, and . By the early , approximately 2,000 individuals remained in the wild, confined to small protected areas. Recovery began with legal protections and on private farms and reserves, leading to a remarkable population increase over the subsequent decades. The subspecies is not included in the appendices, distinguishing it from its close relative, the (D. p. pygargus), which is listed under Appendix II. As of 2025, a proposal to remove the from Appendix II is under consideration at CoP20, potentially affecting regulatory distinctions between the subspecies. However, in , where the majority of blesbok occur, trade, hunting, and translocation are strictly regulated under the National Environmental Management: Act's Threatened or Protected Species () Regulations, requiring permits for commercial activities to prevent and hybridization. Effective management has been driven by game ranching, which sustains the majority of the total population on private lands, promoting sustainable use through and controlled hunting. Reintroduction programs, initiated in , have successfully established herds in over 100 protected sites and reserves, expanding the ' range and while mitigating risks from .

Predators and Human Impacts

The blesbok faces predation primarily from large carnivores, including lions (Panthera leo), leopards (Panthera pardus), cheetahs (Acinonyx jubatus), and spotted hyenas (Crocuta crocuta), which predominantly target calves and juveniles in open grasslands. Smaller predators such as black-backed jackals (Lupulella mesomelas) and martial eagles (Polemaetus bellicosus) occasionally prey on newborn or young calves, exploiting vulnerable moments during calving seasons. To counter these threats, blesbok employ anti-predator strategies centered on speed and collective defense; they can reach sustained speeds of up to 70 km/h during pursuits, allowing evasion over open terrain, while group vigilance in herds reduces individual risk through shared scanning for danger. This herding behavior enhances detection and confusion of predators, as larger groups dilute the chance of any single individual being targeted. Human activities pose significant anthropogenic threats to blesbok populations. for and horns, once a major driver of decline in the late , has diminished since the early due to strengthened ranching and measures on private lands. from agricultural expansion and urban development isolates subpopulations, restricting and access to optimal grazing areas in South Africa's grasslands. Hybridization with the closely related (Damaliscus pygargus pygargus) represents a growing genetic , facilitated by human-mediated translocations for commercial purposes; genetic analyses reveal hybrids in over 67% of sampled sites, potentially eroding blesbok distinctiveness and fitness. Disease transmission from domestic livestock, particularly heartwater (Ehrlichia ruminantium) vectored by ticks, introduces pathogens into wild herds near farming areas, causing subclinical infections that may weaken resilience. In protected reserves, vehicle collisions during activities contribute to mortality, though data remain limited. Sustainable hunting quotas, regulated by provincial authorities and conservancies, mitigate by aligning off-take with population estimates, supporting ranching economies while preserving herd viability.

References

  1. https://animaldiversity.org/accounts/Damaliscus_pygargus/
  2. https://seaworld.org/animals/facts/mammals/blesbok/
  3. https://speciesstatus.sanbi.org/assessment/last-assessment/01892/
  4. https://ewt.org/wp-content/uploads/2022/11/8.-Blesbok-Damaliscus-pygargus-phillipsi_LC.pdf
  5. https://www.researchgate.net/publication/312232146_Blesbok_Damaliscus_pygargus_phillipsi_Bontebok_Damaliscus_pygargus_pygargus
  6. https://academic.oup.com/jhered/article/105/3/324/769938
  7. https://ewt.org/wp-content/uploads/2022/11/9.-Bontebok-Damaliscus-pygargus-pygargus_VU.pdf
  8. https://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&id=37172
  9. https://www.merriam-webster.com/dictionary/blesbok
  10. https://www.sciencedirect.com/science/article/pii/S105579039990619X
  11. https://www.researchgate.net/publication/279691518_Damaliscus_niro_horns_from_Wonderwerk_Cave_and_other_Pleistocene_sites_Morphological_and_chronological_considerations
  12. https://onlinelibrary.wiley.com/doi/full/10.1002/jqs.70002
  13. https://www.krugerpark.co.za/africa_blesbok.html
  14. https://ewt.org/wp-content/uploads/2022/11/8.-Blesbok-Damaliscus_pygargus-phillipsi_LC.pdf
  15. https://www.researchgate.net/publication/316156647_Focus_on_the_Blesbok_Damaliscus_pygargus_phillipsi
  16. https://www.biodiversityexplorer.info/mammals/ruminantia/damaliscus_pygargus_phillipsi.htm
  17. https://www.britannica.com/animal/blesbok
  18. https://www.jstor.org/stable/2404031
  19. https://cites.org/eng/node/7488
  20. https://www.dffe.gov.za/sites/default/files/docs/legal_memos/threatened_protected_species_regs.pdf
  21. https://blog.bookyourhunt.com/blesbok-and-blesbok-hunting/
  22. https://bowkerafricanhunts.com/plains-game/blesbok-hunting/
  23. https://www.researchgate.net/publication/232684004_Foraging_competition_vigilance_and_group_size_in_two_species_of_gregarious_antelope
  24. https://pmc.ncbi.nlm.nih.gov/articles/PMC5214875/
  25. https://www.cfsph.iastate.edu/FastFacts/pdfs/heartwater.pdf
  26. https://www.mdpi.com/2673-7159/5/2/26
  27. https://edepot.wur.nl/633309
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