One of the exhibits on display - Romer's tree frog. Romer's tree frog is endemic to Hong Kong and naturally occurs on Lamma Island, Lantau Island, Chek Lap Kok and Po Toi but nowhere else in the world. Romer's tree frog is the tiniest native frog, about 25 millimetres, with an "X" mark on its back. It is a nocturnal animal feeding on small insects.   Close