The Jozani Chwaka Bay National Park is a 50 km2 (19 sq mi) national park of Tanzania located on the island of Zanzibar. It is the only national park in Zanzibar. The Zanzibar red colobus, Procolobus kirkii (its population count is about 1000) found in the park, a rain forest species (unlike the black-and-white colobus found in other regions of Africa), is also known as Kirk's red colobus, named after Sir John Kirk (1832–1922), the British Resident of Zanzibar who had first brought it to the attention of zoological science. It is now adopted as the flagship species for conservation in Zanzibar, from the mid-1990s. Other species of fauna found in the park are the Sykes monkey, bush babies, more than 50 species of butterfly and 40 species of birds. The nocturnal Zanzibar tree hyrax, which ha