Tammar Wallaby & Joey

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The tammar wallaby (Macropus eugenii), also known as the dama wallaby or darma wallaby, is a small macropod native to South and Western Australia. Though its geographical range has been severely reduced since European colonisation, the tammar remains common within its reduced range and it is listed as of Least Concern by the International Union for Conservation of Nature (IUCN). It has been introduced to New Zealand and reintroduced to some areas of Australia where it had been previously eradicated. Skull differences distinguish tammars from Western Australia, Kangaroo Island and mainland South Australia, making them distinct populations groups or possibly different subspecies.

Around the size of a rabbit, the tammar is among the smallest of the wallabies. Its coat colour is largely grey. The tammar has several notable adaptations, including the ability to retain energy while hopping, colour vision and the ability to drink seawater. A nocturnal species, it spends nighttime in grassland habitat and daytime in shrub. It is also very gregarious and has a seasonal, promiscuous mating pattern. A female tammar can nurse a joey in her pouch while keeping an embryo in her uterus. The tammar is a model species for research on marsupials, and on mammals in general. It is one of many organisms to have had its genome sequenced.

Marsupials are an infraclass of mammals living primarily in the Southern Hemisphere; a distinctive characteristic, common to most species, is that the young are carried in a pouch. Well-known marsupials include kangaroos, the koala, possums, opossums, wombats and the Tasmanian devil. Marsupials represent the clade originating with the last common ancestor of extant metatherians. Like other mammals in the Metatheria, they are characterized by giving birth to relatively undeveloped young, often residing in a pouch with the mother for a certain time after birth. Close to 70% of the 334 extant species occur in Australia, New Guinea, and nearby islands, with the remaining 100 found in the Americas, primarily in South America, but with 13 in Central America, and one in North America, north of Mexico.

A wallaby is any of about thirty species of Macropodidae family. It is an informal designation generally used for any macropod that is smaller than a kangaroo or wallaroo that has not been designated otherwise.

Macropus is a marsupial genus that belongs to the family Macropodidae. It has 14 species which are further divided into 3 subgenera. The genus includes all terrestrial kangaroos, wallaroos and several species of wallaby. The term itself is derived from the Ancient Greek makros "long" and pous "foot". A further 11 extinct species are recognised. The type species is the Eastern Grey Kangaroo.