Some evidence of the predation of Hamilton's frog (Leiopelma hamiltoni (McCulloch)) by tuatara (Sphenodon punctatus (Grey)) on Stephens Island.

Based on a single observation some evidence is presented suggesting that predation of Hamilton's frog by tuatara is occurring on Stephens Island, 40040' S, 1740 00' E in Cook Strait. Bones of the left hind limb of a frog were identified from a tuatara dropping collected from the frogs' habitat. Because of the tenuous state of the island's frog population, factors thought to limit the incidence of predation and the distribution of the frog are discussed. A future management proposal is outlined.