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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.
The presence of alula and a complete set of aerodynamic asymmetric feathers arranged forming a modern wing, [10] indicate well develop flight capabilities, as in many other enantiornithean taxa. [6] Its hindlimb morphology remain uncertain as no material of this kind referable to the genus has been found to date.
Archaeornithura had a moderately advanced plumage, fan-shaped tail feathers, a U-shaped furcula, highly fused wing apexes, and a well-developed alula – a feathered first finger projecting on the front edge of the wing that is typically used to boost manoeuvrability during flight. [2]
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 ...
Online travel websites aren't happy with Google's (GOOG) latest move. Earlier this month, the world's leading search engine began pushing its own flight search feature ahead of other organic results.
The macaw, named Aurora, was first surrendered to this bird rehabilitator in fall of 2022.She had been bought from a pet store as an unweaned baby and probably an illegal capture. The original ...