Search results
Results from the WOW.Com Content Network
A keel or carina (pl.: carinae) in bird anatomy is an extension of the sternum (breastbone) which runs axially along the midline of the sternum and extends outward, perpendicular to the plane of the ribs. The keel provides an anchor to which a bird's wing muscles attach, thereby providing adequate leverage for flight.
Traditionally, Carinatae were defined as all birds whose sternum (breast bone) has a keel (carina). The keel is a strong median ridge running down the length of the sternum. This is an important area for the attachment of flight muscles. Thus, all flying birds have a pronounced keel. Ratites, all of which are flightless, lack a strong keel.
Download QR code; Print/export Download as PDF; ... Pages in category "Bird anatomy" ... Keel (bird anatomy) L. Lore (anatomy) M.
Most birds have four toes, typically three facing forward and one pointing backward. [7] [10] [8] In a typical perching bird, they consist respectively of 3, 4, 5 and 2 phalanges. [2] Some birds, like the sanderling, have only the forward-facing toes; these are called tridactyl feet while the ostrich have only two toes (didactyl feet).
It raises the wing between wingbeats. Both muscle groups attach to the keel of the sternum. This is remarkable, because other vertebrates have the muscles to raise the upper limbs generally attached to areas on the back of the spine. The supracoracoideus and the pectorals together make up about 25–40% of the bird's full body weight. [39]
English: This is an oversimplified cross sectional image of a dome and keel structure not to scale. It is a structure consisting of tonalite-trondhjemite-granodiorite (TTG) diapers shown in orange, with mafic and ultramafic layers, in green, wrapped around them (specifically komatiites and basalts).
Keel (bird anatomy), a perpendicular extension of a bird's breastbone, to which wing muscles anchor; Keel (slug), a morphological feature on the back of some slugs; Caudal keel, in fish; Keeled scales, reptile scales that have a ridge down the center, rather than being smooth; Sagittal keel, a feature of the human skull
Bird ringing is the term used in the UK and in some other parts of Europe, while the term bird banding is more often used in the U.S. and Australia. [49] bird strike The impact of a bird or birds with an airplane in flight. [50] body down The layer of small, fluffy down feathers that lie underneath the outer contour feathers on a bird's body. [51]