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The bones of three fingers are preserved in the bird wing. The question of which fingers they are has been discussed for about 150 years, and an extensive literature is devoted to it. [ 2 ] [ 3 ] The anatomical, paleontological, and molecular data suggests that these are fingers 1–3, but embryological data suggests that these are actually ...
The bones in the wing are extremely light so that the bird can fly more easily. The hips consist of the pelvis, which includes three major bones: the ilium (top of the hip), ischium (sides of hip), and pubis (front of the hip). These are fused into one (the innominate bone). Innominate bones are evolutionary significant in that they allow birds ...
Location of the alula on a bird's wing. The alula / ˈ æ l j ʊ l ə /, or bastard wing, (plural alulae) is a small projection on the anterior edge of the wing of modern birds and a few non-avian dinosaurs. The word is Latin and means "winglet"; it is the diminutive of ala, meaning "wing".
Bird wing bone structure, indicating attachment points of remiges. Remiges (from the Latin for "oarsman") are located on the posterior side of the wing. Ligaments attach the long calami (quills) firmly to the wing bones, and a thick, strong band of tendinous tissue known as the postpatagium helps to hold and support the remiges in place. [8]
Carpometacarpus is in red in this description of the bird wing bones. To non-biologists the carpometacarpus may be best known from buffalo wings. Buffalo wings come in two basic sizes, a large angled one containing three major bones, and a smaller flat one containing only two. The bone missing in the latter is the carpometacarpus.
A number of birds have spurs on their feet or legs, usually formed from the lower portion of the tarsometatarsus bone. Best known are the spurs on chicken, though most galliform birds bear spurs. The spurs are mostly found in males, and used in mating competition or territory defence. Some birds have spurs on the wings rather than the legs.
Also defined: outer wing. The inner wing of a bird is that portion of the wing stretching from its connection to the body and through the "wrist" joint. The outer wing stretches from the wrist to the wingtip. [262] iris The coloured outer ring that surrounds a bird's pupil. Though brown predominates, the iris may be of or include a variety of ...
This stylised bird skeleton highlights the synsacrum Pelvis of a Gull; formed by the Synsacrum (fused vertebrae placed centrally) and the two innominate bones either side The synsacrum is a skeletal structure of birds [ 1 ] and other dinosaurs , [ 2 ] pterosaurs, [ 3 ] as well as xenarthran mammals, [ 4 ] in which the sacrum is extended by ...