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Wallaroo[1]
Euro (Osphranter robustus erubescens)
Scientific classification Edit this classification
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Infraclass: Marsupialia
Order: Diprotodontia
Family: Macropodidae
Genus: Osphranter
Species:
O. robustus
Binomial name
Osphranter robustus
Gould, 1841
Subspecies
  • O. r. erubescens
  • O. r. isabellinus
  • O. r. robustus
  • O. r. woodwardi
Common wallaroo range

The common wallaroo (Osphranter robustus), also known as the euro, hill wallaroo, or simply wallaroo,[2] is a species of macropod. The word euro is particularly applied to one subspecies (O. r. erubescens).[3]

The eastern wallaroo is mostly nocturnal and solitary, and is one of the more common macropods. It makes a loud hissing noise and some of the other subspecies are sexually dimorphic, like most wallaroos.[4]

Subspecies

[edit]

There are four subspecies:[1]

  • the eastern wallaroo (O. r. robustus)[3] – found in eastern Australia; males of this subspecies have dark grey fur, almost resembling the black wallaroo (Osphranter bernardus). Females are lighter, being almost sandy in colour.[4]
  • the euro or western wallaroo (O. r. erubescens)[5] – found covering most of the species' remaining range to the west; this subspecies is variable, but mostly brownish, in colour.[4]
  • the Barrow Island wallaroo (O. r. isabellinus) – this subspecies is restricted to Barrow Island in Western Australia and is comparatively small. It is uniformly reddish-brown.[4]
  • the Kimberley wallaroo (O. r. woodwardi) – this subspecies is found in the Kimberley region of Western Australia and in a band roaming through the Northern Territory. It is the palest of the four subspecies and is a dull brown-grey colour.[4] Kunwinjku of western Arnhem Land call this subspecies ngabudj. They also have separate names for male and female, galkibard and wallaar, respectively. A large male is called ganduki.[6] This animal manages well in areas without permanent water and on a diet of nutrient-poor grasses, but it does need shelter.[6]

The eastern wallaroo (O. r. robustus)—which is dark grey in colour—occupies the eastern slopes of the Great Dividing Range, and the euro (O. r. erubescens)—which is mostly brownish in colour—occupies the land westward.

Reproduction

[edit]

Wallaroo females can give birth at any time during the year. Through a process called embryonic diapause they are able to get pregnant any time after giving birth, but the embryo does not start to develop until the previous joey is able to leave the pouch of the mother. Wallaroos are also polygynous, which means that the males can have multiple female partners.[7]

Male wallaroos will engage in non-deadly physical combat over mating access to females.[8]

The gestation period lasts around 30 to 38 days, after which the young joey travels into the mother's pouch where it suckles and develops.[7] The young joeys start to leave the pouch at around six months and by nine months they no longer spend most of their time in the pouch.[9] Male wallaroos are fully developed at around 18 to 20 months; females are fully developed at around 14 to 24 months.[7]

The relationship with the joey and their parents changes as the joey grows and gets older. During the time in which the joey is in the pouch, the father stays around to protect the joey and mother from predators, but once this protection is no longer needed the relationship weakens between the two. After the joey no longer needs its mother for food, it still maintains a close relationship with her.[8]

Status

[edit]

The eastern wallaroo as a subspecies is not considered to be threatened, but the Barrow Island subspecies (O. r. isabellinus) is classified as vulnerable.[2]

Taxonomy

[edit]

In 2019, a reassessment of macropod taxonomy determined that the species should be moved from the genus Macropus to the genus Osphranter.[10] This change was accepted by the Australian Faunal Directory in 2020.[11]

References

[edit]
[edit]
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Common wallaroo

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from Grokipedia
The common wallaroo (Osphranter robustus), also known as the euro or hill wallaroo, is a robustly built macropod marsupial endemic to mainland Australia, distinguished by its stocky body, short forelimbs, and adaptations for navigating rocky terrains, with males typically larger than females and weighing up to 42 kg.[1][2] This species inhabits a variety of arid and semi-arid environments, primarily rocky hills, escarpments, and open woodlands with sparse vegetation, where it seeks shelter in caves or overhangs to avoid extreme heat.[1][2] Characterized by coarse fur ranging from light grey to dark brown or nearly black, the common wallaroo measures 79–116 cm in head-body length, with a tail up to 75 cm that aids in balance on uneven ground; its hind feet are broad and rough-soled for gripping rocks, and it exhibits sexual dimorphism, with males possessing a darker, coarser coat than the lighter-furred females.[1][2] The species comprises four subspecies: the eastern wallaroo (O. r. robustus), euro (O. r. erubescens), Barrow Island euro (O. r. isabellinus), and Kimberley wallaroo (O. r. woodwardi), each adapted to specific regional variations in terrain and climate.[3] Its diet consists mainly of grasses, forbs, and shrubs, supplemented by browsing on nutrient-poor plants, allowing it to survive extended periods without free water by obtaining moisture from vegetation.[1] Widely distributed across most of mainland Australia—including New South Wales, Queensland, Northern Territory, South Australia, Western Australia, Victoria, and the Australian Capital Territory—but absent from Tasmania, Cape York Peninsula, and coastal southeastern regions, the common wallaroo occupies home ranges of 40–300 ha (0.4–3 km²) and is generally solitary or found in small, loose groups led by a dominant male.[3][2] Behaviorally, it is primarily nocturnal or crepuscular, hopping at speeds up to 50 km/h when fleeing predators such as dingoes or wedge-tailed eagles, and males engage in ritualized "boxing" fights to establish dominance during mating.[1] Reproduction occurs year-round, with a gestation period of 30–38 days yielding a single joey that remains in the pouch for about 9 months before weaning at 15–16 months; sexual maturity is reached at 18–19 months for males and 21–24 months for females.[1] Overall, the common wallaroo is classified as Least Concern on the IUCN Red List due to its large population and extensive range, though the Barrow Island subspecies is considered vulnerable owing to habitat limitations and a population of around 18,000 individuals, while the eastern subspecies faces regional threats like habitat fragmentation in southeastern Australia.[4][1] Conservation efforts focus on managing interactions with livestock in pastoral areas and mitigating impacts from climate change, which could exacerbate drought stress in its preferred rocky habitats.[5]

Taxonomy

Taxonomic history

The common wallaroo was first described by John Gould in 1841 as Macropus robustus, placing it within the broad genus Macropus that encompassed various kangaroos and wallaroos. For much of the 20th century, it remained classified under this genus, reflecting traditional groupings of macropodids based primarily on morphological similarities such as body size and robust build. In 2015, Stephen Jackson and Colin Groves proposed recognizing Osphranter as a subgenus within Macropus in their comprehensive review Taxonomy of Australian Mammals, distinguishing it for larger, more robust species including M. robustus, based on preliminary assessments of morphological and distributional differences. This laid the groundwork for further systematic revision. Then, in 2019, Mélina Celik and colleagues conducted a detailed molecular and morphometric study of the Macropus complex, analyzing nuclear and mitochondrial DNA sequences alongside geometric morphometrics of skull shapes from multiple specimens. Their findings demonstrated the paraphyly of Macropus and supported elevating Osphranter to genus rank, reclassifying M. robustus as Osphranter robustus due to strong genetic clustering and distinct cranial adaptations indicative of separate evolutionary lineages diverging around 4–5 million years ago. Phylogenetically, O. robustus occupies a position within the monophyletic genus Osphranter, which comprises robust macropods adapted to arid environments; specifically, it forms a clade with O. antilopinus as sister taxa, together closely related to the red kangaroo (O. rufus) and black wallaroo (O. bernardus), highlighting shared ancestry among these larger kangaroo-like species. This taxonomic shift was promptly adopted by the International Union for Conservation of Nature (IUCN) in its 2019 Red List assessment, listing the species as Osphranter robustus and assessing it as Least Concern. The Australian Faunal Directory followed suit in 2020, officially updating its nomenclature to reflect the genus-level reclassification. Such revisions underscore how geographic isolation has contributed to intraspecific variation, including recognized subspecies.

Subspecies

The common wallaroo (Osphranter robustus) is classified into four main subspecies, distinguished primarily by geographic distribution, subtle morphological variations, and genetic markers that reflect adaptation to diverse Australian environments. The nominate subspecies, O. r. robustus (eastern wallaroo), occupies temperate regions of eastern Australia, ranging from coastal areas to the inland western slopes of the Great Dividing Range in New South Wales and beyond. This subspecies exhibits a more robust build with darker grey to blackish fur, especially in adult males, which contrasts with the paler tones of other variants. In contrast, O. r. erubescens (euro) is distributed across arid inland and western Australia, including the western plains of New South Wales. It is generally paler in coloration, featuring dull brown-grey fur that is longer and coarser than in eastern populations, aiding thermoregulation in hotter, drier habitats. The O. r. isabellinus (Barrow Island wallaroo) represents an isolated island population restricted to Barrow Island off northwestern Western Australia. This diminutive subspecies is the smallest among the four, with reduced body size likely resulting from insular dwarfism. Finally, O. r. woodwardi (Kimberley wallaroo) inhabits the rocky terrains of northern Australia, particularly the Kimberley region. It displays intermediate coloration, often with reddish-brown tones, and a build suited to rugged, tropical landscapes. Post-2019 molecular and morphometric analyses have provided genetic evidence affirming the validity of these subspecies, demonstrating distinct phylogenetic clustering and supporting their recognition within the reclassified genus Osphranter.[6]

Physical description

Size and morphology

The common wallaroo exhibits significant sexual dimorphism in size, with adult males typically measuring 100–140 cm in head-body length, possessing a tail of 70–90 cm, and weighing 28–42 kg (up to 60 kg), while females are smaller, with head-body lengths of 80–110 cm, tails of 60–80 cm, and weights of 18–28 kg.[1][7] These measurements reflect the species' robust physique adapted to varied Australian landscapes, though individual variation occurs across subspecies and regions.[1] Morphologically, the common wallaroo features a stocky build with a shorter, wider torso and relatively shorter limbs compared to other macropods, contributing to its compact, powerful frame.[1] The hind limbs are muscular and elongated for propulsion, while the forelimbs are smaller and used primarily for balance and grooming. The tail is short and robust, serving as a counterbalance during movement and a prop when stationary. Feet are large and broad, with roughened pads on the soles that enhance grip on uneven surfaces.[1] These traits represent key adaptations for navigating rocky and hilly terrains, where the species often resides; the powerful hind legs enable bounding leaps up to 4 m and agile climbing, while the specialized foot pads prevent slippage on steep, irregular rocks.[1]

Coloration and variation

The common wallaroo exhibits coarse, shaggy fur that varies widely in coloration, typically ranging from light grey-brown to reddish-brown on the upperparts, with paler underparts and blackish lower legs and feet.[8] This pelage is denser on the dorsal surface and sparser ventrally, contributing to its overall rugged appearance adapted to rocky environments.[9] Intraspecific variation is pronounced, influenced by geographic distribution and subspecies. The eastern subspecies (O. r. robustus) features darker coats, often grey to black on the upper body, while the more westerly O. r. erubescens (euro) displays sandier, reddish-brown tones; other subspecies like O. r. woodwardii show intermediate dark grey-brown hues.[10] Both light orange patches on the neck and shoulders and pale markings around the muzzle and eyelids are common across forms, enhancing subtle contrasts in the pelage.[8] Sexual dimorphism is evident in coloration, with males generally darker and more intensely pigmented—often a mix of black and rusty red—compared to females, which tend to be lighter with blue-grey and rusty red tones.[8] In the eastern subspecies (O. r. robustus), males display predominantly black upperparts, while females maintain a lighter grey variation.[5] This dimorphism persists throughout adulthood, though specific age-related shifts in tone intensity remain minimally documented.

Distribution and habitat

Geographic range

The common wallaroo (Osphranter robustus) is endemic to mainland Australia, with a widespread distribution across the continent excluding Tasmania, southern Western Australia, most of Victoria, Cape York Peninsula, and coastal southeastern regions. Its core range encompasses arid, semi-arid, and temperate zones, extending from Queensland in the east to Western Australia in the west.[7][11][12] The species comprises four recognized subspecies, each with distinct distributions on the mainland. O. r. robustus (eastern wallaroo) occurs primarily in the eastern states, including New South Wales and Queensland, with rarer occurrences in Victoria. O. r. erubescens (euro) inhabits the drier inland regions from western New South Wales and Queensland westward to Western Australia. O. r. isabellinus (Barrow Island euro) is restricted to Barrow Island off the coast of Western Australia. O. r. woodwardi (northern wallaroo) is found in the tropical northern regions, specifically the Kimberley in Western Australia and parts of the Northern Territory. Historically, the common wallaroo's range has remained stable, with no significant contractions observed as of 2025; populations continue to occupy much of their documented mainland extent, supported by ongoing monitoring indicating persistence across arid and semi-arid landscapes.[7][11]

Habitat preferences

The common wallaroo (Osphranter robustus) exhibits a strong preference for rugged, rocky terrains that offer natural shelter, including hills, outcrops, escarpments, caves, and overhangs, which protect against extreme heat and predation.[1] These features allow the species to thermoregulate effectively in harsh environments, with individuals often retreating to shaded crevices during the day. Habitats are typically selected near reliable water sources, such as streams or soakages, although the wallaroo can access subsurface water by digging in dry creek beds when surface supplies are scarce.[13][1] Adapted to arid and semi-arid conditions, the common wallaroo thrives in regions with low annual rainfall, such as the Pilbara in northwestern Australia, where precipitation averages 200–350 mm. It utilizes rocky overhangs for shade to minimize water loss and can survive up to two weeks without free water by deriving moisture from vegetation and metabolic processes. This tolerance extends to broader habitats ranging from dry sclerophyll woodlands to arid shrublands, where steep slopes and ridges provide essential cover amid sparse vegetation.[1][14] Habitat fragmentation poses challenges for certain subspecies, notably O. r. isabellinus (Barrow Island euro), which is confined to the isolated Barrow Island off Western Australia, limiting gene flow and exposing the population to nutritional constraints and development threats within its restricted rocky habitat.[1][15]

Behavior and ecology

Activity patterns and social structure

The common wallaroo (Osphranter robustus) displays primarily crepuscular and nocturnal activity patterns in its arid and semi-arid environments, allowing it to avoid extreme daytime heat and predation risks, though it shifts to more diurnal behavior during cooler seasons such as winter.[16] Observations indicate that individuals emerge from rocky shelters around dawn and dusk for foraging and movement, with activity peaking in the early morning and late evening hours, while retreating to caves, overhangs, or gullies during midday. This thermoregulatory strategy is adaptive to the species' rocky habitats, where shade and protection are limited.[1] Socially, the common wallaroo maintains a largely solitary lifestyle, with individuals occupying small, stable home ranges typically 1–3 km², often centered on permanent rocky refuges or proximity to water sources for security and resource access.[17][18] These ranges exhibit low overlap between adults, reflecting minimal territorial aggression outside of breeding contexts, though temporary dispersal may occur after rainfall events before individuals return to familiar areas. Loose, flexible aggregations of 2–10 individuals occasionally form at waterholes or resource-rich sites, but these groups lack stable hierarchies and dissolve quickly, emphasizing the species' asocial tendencies compared to more gregarious macropods. Communication plays a key role in social interactions, with the common wallaroo producing a distinctive nasal hiss as an alarm call, often paired with loud foot stomping to alert nearby individuals to threats before fleeing to cover.[1] Male-male contests for dominance or access to refuges involve ritualized, non-lethal displays such as boxing with the forelimbs and powerful kicks from the hind legs, establishing a loose hierarchy without severe injury. This structure facilitates polygynous mating, where dominant males briefly consort with estrous females within their ranges.

Diet and foraging

The common wallaroo (Osphranter robustus) is herbivorous, with a diet centered on grasses, forbs, shrubs, and browse, adapted to the nutrient-poor vegetation of its arid and semi-arid habitats. It selectively grazes on soft-textured grasses in areas where available, and consumes coarser species such as Triodia in rocky regions, where plant quality is often limited, and supplements with shrub leaves to meet nutritional needs.[1][19] This selective feeding allows it to exploit sparse resources in low-rainfall areas with poor soils. Foraging occurs primarily during crepuscular periods at dawn and dusk, when wallaroos move from rocky shelters to more open areas to browse, minimizing exposure to predators and heat. In rugged terrain, their robust build and agile movement enable access to elevated vegetation on cliffs and boulders that is unavailable to other herbivores, enhancing foraging efficiency in otherwise inaccessible spots. Water requirements are largely met through moisture in foliage, allowing survival for extended periods without free water sources. Diet composition shifts seasonally to cope with environmental variability; during wetter periods, grasses and forbs dominate intake due to their abundance and higher nutritional value, while in dry seasons, the proportion of browse and shrubs increases to compensate for reduced grass availability. In severe drought, however, grasses may still comprise a significant portion, reflecting the wallaroo's adaptability as a grazer even under stress.

Reproduction and life cycle

Mating and gestation

The common wallaroo (Osphranter robustus) employs a polygynous mating system characterized by scramble competition, in which males defend large home ranges—often more than twice the size of female ranges—to access multiple females, with dominance established through aggressive displays and physical confrontations rather than lethal combat. This solitary social structure influences mate selection, as individuals largely forage and rest alone, leading males to patrol extensive areas for encounters with receptive females. Breeding is continuous year-round across most populations, though births peak during the wet season in northern regions, coinciding with improved nutritional availability that supports reproduction. Females are polyoestrous and typically enter oestrus shortly after parturition (post-partum oestrus), mating with a male and forming a blastocyst that promptly enters embryonic diapause—a temporary arrest in development at the blastocyst stage. This adaptive mechanism suspends embryonic growth for up to 2–3 months (or longer under prolonged lactation), allowing the female to prioritize nursing her current young while delaying the next birth until resources permit, thereby enhancing offspring survival in variable arid environments. Upon reactivation of the embryo, active gestation proceeds for 30–38 days, culminating in the birth of a single, highly altricial neonate weighing about 0.7–1 gram—roughly the size of a jellybean, blind, hairless, and with underdeveloped forelimbs.[1] The tiny joey emerges from the urogenital sinus and, driven by innate reflexes, uses its forelimbs to crawl unaided through the mother's fur to the pouch, a journey that takes 2–3 minutes, where it latches onto a nipple to suckle and complete its development.[1]

Development of young

The newborn common wallaroo joey, weighing approximately 0.7 grams and highly altricial, instinctively crawls into the mother's pouch shortly after birth and attaches firmly to a teat, initiating a prolonged period of pouch attachment lasting 8 to 8.5 months. During this phase, the joey is nourished exclusively by maternal milk, which varies in composition to support rapid growth, and remains fully enclosed for protection while the mother forages and moves through rocky terrain.[1] This attachment is facilitated by the immediate post-partum oestrus and embryonic diapause, allowing the mother to conceive a subsequent embryo that remains dormant until the current joey vacates the pouch. As the joey matures, it begins to peek out of the pouch around 6 months of age, venturing out for brief periods to explore but returning regularly for nursing and safety until permanent emergence at approximately 9 months.[1] Weaning occurs between 15 and 17 months, when the young-at-foot (now outside the pouch) follows the mother closely, suckling intermittently while transitioning to a herbivorous diet, and achieves full independence around 18 to 20 months.[1] Throughout this post-pouch stage, maternal care remains intensive; the female carries the joey during foraging excursions, grooms it, and seeks shelter in rocky outcrops to shield it from predators and environmental stresses.[1] Sexual maturity is reached by females at 14 months and males at 18 months, enabling reproduction within the second year of life. In the wild, common wallaroos typically live 12 to 18 years, though maximum recorded longevity reaches up to 24 years under optimal conditions.[20][21]

Conservation status

Population and threats

The common wallaroo (Osphranter robustus) is classified as Least Concern on the IUCN Red List, with assessments from the late 2010s confirming its stable overall status due to extensive distribution and lack of significant population declines.[4] Population estimates indicate millions of individuals across mainland Australia, supported by commercial harvest surveys in key regions such as Queensland (over 1 million in harvest zones) and New South Wales (approximately 366,000 individuals in the Northern Tablelands, including northeastern zones, based on 2022 aerial surveys), where densities vary from 2 to 80 individuals per km² depending on seasonal rainfall.[22][23] Its widespread range across arid and semi-arid habitats buffers against localized pressures, maintaining population stability as of 2025. Among subspecies, O. r. isabellinus (Barrow Island wallaroo) is vulnerable due to its endemism on a small offshore island, with an estimated population of approximately 1,500 individuals (range 1,200–1,850 as of 2015) confined to limited habitat, making it susceptible to stochastic events.[24] In contrast, mainland subspecies such as O. r. robustus, O. r. erubescens, and O. r. woodwardi remain secure, with no evidence of substantial reductions.[7] Major threats to the species include habitat degradation from mining activities and overgrazing by livestock, which alter rocky outcrops and arid ranges preferred by wallaroos; predation by introduced foxes (Vulpes vulpes) and native dingoes (Canis dingo), particularly affecting juveniles; and climate change-driven impacts such as increased aridity, higher temperatures, and more frequent droughts that reduce forage availability in core habitats.[25][13] Despite these pressures, aerial surveys and monitoring programs report no major population declines across its range as of 2025, with numbers fluctuating naturally in response to environmental conditions rather than anthropogenic factors.[26]

Protection measures

The common wallaroo (Osphranter robustus) is protected under various Australian state laws, including the Biodiversity Conservation Act 2016 in New South Wales, which makes it an offence to harm, possess, or trade the species without authorisation.[27] Similar protections apply across other states, such as Queensland's Nature Conservation Act 1992, regulating any harvesting or disturbance through approved management plans.[28] The subspecies O. r. isabellinus, known as the Barrow Island euro, receives additional safeguards as a vulnerable taxon under the federal Environment Protection and Biodiversity Conservation Act 1999 and as a specially protected species under Western Australia's Biodiversity Conservation Act 2016, with specific island-based conservation plans emphasising biosecurity and habitat integrity.[29][30] Management efforts focus on habitat restoration in mining-impacted regions, particularly around major projects like the Gorgon gas development on Barrow Island, where environmental offset funding supports vegetation rehabilitation and translocation programs to mitigate industrial effects on wallaroo habitats.[31] Feral predator control programs are integral on offshore islands like Barrow, enforced through rigorous biosecurity protocols that prevent the introduction of cats and foxes, thereby preserving a predator-free refuge for native macropods.[32] Population monitoring employs camera traps across northern and eastern Australia to track distribution and abundance, informing adaptive management under state wildlife plans.[33] Future conservation needs include updated genetic studies to refine subspecies delineations following the 2020 taxonomic revisions that elevated Osphranter to genus level, addressing potential hybridisation risks in fragmented habitats.[34] As of 2025, developing climate adaptation strategies is essential, given projections of range contractions due to warming and altered rainfall patterns, with targeted research needed to enhance resilience in vulnerable populations such as the Barrow Island subspecies.[35]

References

  1. Macropus robustus (hill wallaroo) - Animal Diversity Web
  2. Macropus robustus, Common Wallaroo - Museums Victoria Collections
  3. Species Osphranter robustus (Gould, 1841) - Australian Plant Census
  4. The IUCN Red List of Threatened Species
  5. [PDF] Threatened Species Assessment Osphranter robustus robustus
  6. None
  7. [PDF] Kangaroo and wallaby identification guide - Squarespace
  8. [PDF] 29. macropodidae - Fauna of Australia Volume 1b - Mammalia
  9. The biology of kangaroos (Marsupialia-Macropodidae)
  10. [PDF] Common Wallaroo Macropus robustus – reject a proposal to list
  11. Species nominations not prioritised for assessment - DCCEEW
  12. Subspecies definitions and legislation: from eastern wallaroo ...
  13. (PDF) Home Range of the Common Wallaroo, Macropus-Robustus ...
  14. Control and Conservation of Abundant Kangaroo Species - PMC
  15. [PDF] Pilbara bioregion - DCCEEW
  16. Stress in an Island kangaroo? The Barrow Island euro, Macropus ...
  17. Optimising Camera Trap Surveys for the Rocky Landform Specialists ...
  18. Space use patterns of the Common Wallaroo, Macropus robustus ...
  19. Male Reproductive Tactics and Female Choice in the Solitary ...
  20. Longevity Records: Life Spans of Mammals, Birds, Amphibians ...
  21. Wallaroo (Macropus robustus) longevity, ageing, and life history
  22. [PDF] 2025 Quota Submissions for Commercially Harvested Macropods in ...
  23. (PDF) From Safe to Stranded: Land Use and Climate Change ...
  24. Kangaroo management is backed by science
  25. Kangaroo management in New South Wales
  26. Harvesting macropods in Queensland | Environment, land and water
  27. [PDF] A Guide to the Mammals of Barrow Island - Chevron Australia
  28. [PDF] Gazette 144 of 2022 - Western Australian Legislation
  29. Industry environmental offset funding facilitates a large multi-species ...
  30. Lessons from Barrow Island's Gorgon gas project
  31. [PDF] A guide for the use of remote cameras for wildlife survey in northern ...
  32. (PDF) Taxonomy and Diversity of Living Australasian Marsupials
  33. From Safe to Stranded: Land Use and Climate Change Threaten ...
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