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Onychognathus is a genus of starlings native to the Afrotropical realm.. All the species are quite similar, and characterised by rufous primary wing feathers, very obvious in flight.
Their wings and tail are mostly olive green with yellow edges on the wing coverts, flight feathers, and tail feathers. Their underparts are mostly off-white with faint darker streaks on the breast and sometimes a pale yellow wash on the belly and undertail coverts.
Red kite (Milvus milvus) in flight, showing remiges and rectrices. Flight feathers (Pennae volatus) [1] are the long, stiff, asymmetrically shaped, but symmetrically paired pennaceous feathers on the wings or tail of a bird; those on the wings are called remiges (/ ˈ r ɛ m ɪ dʒ iː z /), singular remex (/ ˈ r iː m ɛ k s /), while those on the tail are called rectrices (/ ˈ r ɛ k t r ...
The wing feathers are a buff or ocherous-buff shading into olive towards the inner bottom wing. The bird's upper breast is a vinous-buff and separated by a narrow band of black boarded with white. The lower breast has a dull yellow-buff that changes gradually into a chocolate colour, with the centre of the abdomen is black.
The word is Latin and means "winglet"; it is the diminutive of ala, meaning "wing". The alula is the freely moving first digit, a bird's "thumb", and typically bears three to five small flight feathers, with the exact number depending on the species. There also are minor covert feathers overlying the flight feathers.
Schalow's turaco showing wing feathers during short flights. These birds are light for a turaco species; weighing just over half a pound (270g), with a length of 15 to 17 inches. Their colour is a coppery-jade green that fades to a dark iridescent blue the closer you get towards the tail.
Neumann's starling (Onychognathus neumanni) or Neumann's red-winged starling, is a bird native to Africa.This starling breeds on rocky cliffs, outcrops and gorges mainly in the Sahel from Mauritania and Equatorial Guinea to western Sudan.
Also, covert feathers; tectrices – singular: tectrix. A layer of non-flight feathers overlaying and protecting the quills of flight feathers. At least one layer of covert feathers appear both above and beneath the flight feathers of the wings as well as above and below the rectrices of the tail. [116] These feathers may vary widely in size.