Red-winged Starlings

Red-winged starling is a native to eastern Africa from Ethiopia to the Cape in South Africa (this one in the photo was spotted in Arusha, Tanzania).
The male of this 27–30-centimetre (11–12 in) long starling has mainly iridescent black plumage, with chestnut flight feathers, which are particularly noticeable in flight. The female has an ash-grey head and upper breast. The juvenile resembles the male, but is less glossy than the adults, and has brown rather than dark red eyes (Wikipedia).

A Red-winged Starling