Romer's tree frog is a species of frog native to Hong Kong and a small portion of Guangxi, China. With an average snout-vent length of 1.5 – 2.5 cm, it is the smallest amphibian recorded in the territory. Despite its common name, it belongs to the family Rhacophoridae, instead of the Hylidae.

Lamma Island, also known as Y Island or Pok Liu Chau or simply Pok Liu, is the third largest island in Hong Kong. Administratively, it is part of the Islands District. Lamma Island is a rural area.