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The Swamp Wallaby (Wallabia bicolor) is a small macropod marsupial of eastern Australia. This wallaby is also commonly known as the Black Wallaby, with other names including Black-tailed Wallaby, Fern Wallaby, Black Pademelon, Stinker (in Queenslandmarker), and Black Stinker (in New South Walesmarker). The Swamp Wallaby is currently the only living member of the genus Wallabia.

Habitat and distribution

The Swamp Wallaby is found from the northernmost areas of Cape Yorkmarker in Queenslandmarker, down the entire east coast and around to south-western Victoriamarker. It was formerly found through to south-eastern South Australiamarker, but is now rare or absent from that region.

It inhabits thick undergrowth in forests and woodlands, or shelter during the day in thick grass or ferns, emerging at night to feed. Brigalow scrub in Queensland is a particularly favoured habitat.


A male Swamp Wallaby sleeping
The species name bicolor comes from the distinct colouring variation, with the typical grey coat of the macropods varied with a dark brown to black region on the back, and light yellow to rufous orange on the chest. A light coloured cheek stripe is usually present, and extremities of the body generally show a darker colouring, except for the tip of the tail, which is often white.

The gait of differs from other wallabies, with the Swamp Wallaby carrying its head low and tail out straight.

The average length is 76 cm (30 in) for males, and 70 cm (27.5 in) for females (excluding the tail). The tail in both sexes is approximately equal in length to the rest of the body. Average weight for males is 17 kg (37 lb), females averaging 13 kg (29 lb).


The Swamp Wallaby becomes reproductively viable from 15-18 months of age, and can breed throughout the year. Gestation is from 33-38 days, leading to a single young. The young is carried in the pouch from 8-9 months, but will continue to suckle until about 15 months. The Swamp Wallaby exhibits an unusual form of embryonic diapause, differing from other marsupials in having its gestation period longer than its oestrous cycle.


The Swamp Wallaby is typically a solitary animal, but often aggregates into groups when feeding. It will eat a wide range of food plants, depending on availability, including shrubs, pasture, agricultural crop, and native and exotic vegetation. It appears to be able to tolerate a variety of plants poisonous to many other animals, including brackens and hemlock.

The preferred diet appears to involve browsing shrubs and bushes, rather than grazing grasses. This is unusual in wallabies and other macropods, which typically prefer grazing. Tooth structure reflects this preference for browsing, with the shape of the molar differing from other wallabies. The fourth premolar is retained through life, and is shaped for cutting through coarse plant material.

According to Aboriginal people of the Bundjalung Nation, the Swamp Wallaby was considered inedible, due to its smell and taste after cooking. Commercial shooter also find it undesirable due to its small size and coarse fur.

Taxonomic debate

A female Swamp Wallaby.
Several physical and behavioral characteristics make the Swamp Wallaby different enough from other wallabies that many authors place it apart in its own genus, Wallabia. Others however point out swamp wallabies can hybridize with Macropus agilis (the Agile Wallaby), so perhaps should be placed in the genus Macropus.


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