Rana longicrus, commonly known as the Taipa frog or long-legged brown frog, is a species of frog in the Ranidae family, endemic to northern and central Taiwan. Its natural habitats are subtropical broadleaf forests as well as cultivated fields below 1000 m elevation. Breeding takes place in marshes, pools, and ponds. It is threatened by habitat loss, in particular due to infrastructure development, but also pollution.