ナムビアアマツバメ Apus bradfieldi

A large, chunky, strong-flying swift that is gray-brown and appears scaled on the underparts. The darker tail and flight feathers contrast with the body. It is resident and nomadic in arid habitats, preferring rocky cliffs, gorges, and hills, where it is often the most frequently encountered swift. It is paler, more slender, and narrower-winged than other co-occurring large dark swifts.