Liuixalus romeri

Romer's tree frog is a tiny rhacophorid native to Hong Kong and a small part of Guangxi. Averaging 1.5–2.5cm in snout–vent length, it is the smallest amphibian recorded in Hong Kong. Its tan-brown back bears crooked dark lines that usually form an X-like marking, with an inverted V behind it. The granular-skinned frog has a blunt triangular snout, barred slender hind legs and small adhesive disks on its digits. (Wikipedia, general species account)

This strictly nocturnal frog occupies wooded places near streams or other shallow breeding water, resting on low vegetation, leaf litter or bare ground. Adults eat termites, crickets, spiders and other small arthropods. Breeding occurs from early March through September. A female attaches as many as 120 eggs to submerged stones, plant debris or vegetation; captive tadpoles metamorphosed after four to six weeks. (Wikipedia, general species account)