Flag of Zanzibar yellow cloves was added to the flag. On 12 January 1964, John Okello overthrew the Sultan of Zanzibar and adopted a black-yellow-blue tricolour as the flag of the People's Republic of Zanzibar and Pemba. On 29 January, the country's flag was changed to a blue-black-green tricolour with a thin white stripe at the hoist. This design, which was based on the flag of the Afro-Shirazi Party, was the longest-lived of the post-independence flags and eventually formed the basis for the current flag. On 26 April 1964, Zanzibar united with Tanganyika to form the new country of Tanzania and Zanzibar's old
Wildlife of Zanzibar mango. Along with small animals, Zanzibar is known for several oversized species, such as the giant rat ("Cricetomys gambianus cosensi") which can be up to a metre (3 ft) long with the tail. Dugong, internationally endangered species still occur in the region. Birds found in Zanzibar including Pemba Island and Mafia Island (not governed by the semi-autonomous region of Zanzibar), are about 240 species of which: globally threatened species are four, introduced species is one and Endemics are species are eight. The genera of the birds and some of the details of extirpated, introduced, vulnerable and threatened spices are given