Wallace's flying frog or the Abah River flying frog (Rhacophorus nigropalmatus) is a moss frog found at least from the Malay Peninsula into western Indonesia. It is named for the biologist, Alfred R. Wallace, who collected the first specimen to be formally identified. R. dennysii, R. maximus and Polypedates feae were once contained within Wallace's flying frog as subspecies. Similar frogs also occur in Laos, Vietnam, and southern China; these may be R. nigropalmatus or an undescribed, closely related species.