Cotara Australiana Gallirallus castaneoventris

Secretive, very large rail (approaching Australasian Swamphen in size), only likely to be seen in and near mangroves, foraging in the mud along tidal creeks and estuaries in northern Australia. Olive brown above, chestnut below, with gray head, chalky yellow bill, and yellow legs. Calls loudly, with grunts and wild honking squawks.