Cook's Swifts breed in limestone caves of Thailand, Myanmar and Indochina has a green iridescence, a shallow tail fork and is a short distance migrant.
Cook's Swifts breed in limestone caves of Thailand, Myanmar and Indochina has a green iridescence. Cook's Swifts breed in limestone caves of Thailand, Myanmar and Indochina is a short distance migrant. A green iridescence is a shallow tail fork.