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This image is a derivative work of the following images: File:Squelette_oiseau.JPG licensed with Cc-by-2.5, GFDL 2006-12-29T20:20:05Z Svtiste 892x1188 (140141 Bytes) Bird squeleton. Squelette d'oiseau. [[Category:Bird Anatomy]] Uploaded with derivativeFX
Birds have many bones that are hollow (pneumatized) with criss-crossing struts or trusses for structural strength. The number of hollow bones varies among species, though large gliding and soaring birds tend to have the most. Respiratory air sacs often form air pockets within the semi-hollow bones of the bird's skeleton. [1]
The high fat content of bone marrow makes the net energy value of bone almost as good as that of muscle, even if bone is less completely digested. A skeleton left on a mountain will dehydrate and become protected from bacterial degradation, and the bearded vulture can return to consume the remainder of a carcass even months after the soft parts ...
The furcula (Latin for "little fork"; pl.: furculae) [a] or wishbone is a forked bone found in most birds and some species of non-avian dinosaurs, and is formed by the fusion of the two clavicles. [1] In birds, its primary function is in the strengthening of the thoracic skeleton to withstand the rigors of flight.
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).
In birds, the pubic symphysis is present only in the ostrich, and the two hip bones are usually widely separated, making it easier to lay large eggs. [8] In therapsids, the hip bone came to rotate counter-clockwise, relative to its position in reptiles, so that the ilium moved forward, and the pubis and ischium moved to the rear. The same ...
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The innominate is known from seven examples, but most are quite incomplete. It includes a narrow ilium and long ischium. [65] The ischial tuberosity, a narrow rough piece of bone in most placentals, is broad and smooth in Plesiorycteropus. [66] With 17 specimens, the femur is the best represented long bone.