Widespread in Hong Kong Island (e.g. Tai Tam Reservoir, Pofulam reservoir, Lung Fu Shan, etc). Rarely found in New Territories (e.g. Mui Tze Lam) and Lantau Island (Ngong Ping).
Eastern Guanxgi, southern Hunan, Hubei, and Guangdong to Hongkong, Lantau Island, and the adjacent mainland peninsula in Fujian, China; nominal allopatric population in northeastern Vietnam (Lang Son and Ha Bac provinces)
This species is once thought to be endemic in Hong Kong. However, more records are found in other locations which suggests a much wider distribution of this species.