The region abounds with a diversity of waterfowl, wading birds, reptiles, marsupials, rodents, and bats. Resident mammals, many of which are endemic, include such well-known species as the short-beaked echidna
), agile wallaby (Macropus agilis
), and the red kangaroo
). Extremely high numbers of migratory and resident waterfowl and wading birds are found here.
These include the comb-crested jacana
), great billed heron
), green pygmy goose (Nettapus pulchellus
), grey teal (Anas gracilis
), plumed whistling-duck (endrocygna eytoni
), wandering whistling-duck (D. arcuata
), and the magpie goose (Anseranas semipalmata
). Also found are Gouldian finches (Chloebia gouldiae
), golden-shouldered parrots (Psephotus chrysopterygius
), and freshwater crocodiles
Trans Fly savanna and grasslands is home to 43 mammals, including 4 small marsupials whose ranges fall mostly or completely within this ecoregion: the Papuan planigale, bronze quoll, chestnut dunnart, and dusky pademelon.
One lizard, the Kimberly rock monitor, is found only in the Kimberly savanna area, and may grow to more than 80 cm (30 in) in length.