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Anterior thoracic vertebrae are fused in many birds and articulate with the notarium of the pectoral girdle. [13] Diagram of a general bird pelvic girdle skeleton including the lower vertebral column sections. Note that the caudal vertebrae (5–10) are not fused in this diagram but can be in certain species.
Specifically, the foramina in their vertebrae through which the vertebral arteries pass are about ten times the diameter of the artery, instead of about the same size as the artery, as is the case in humans; the vertebral arteries enter the cervical vertebrae higher than in other birds, giving the vessels some slack, and the carotid arteries ...
Brains of an emu, a kiwi, a barn owl, and a pigeon, with visual processing areas labelled. The avian brain is the central organ of the nervous system in birds. Birds possess large, complex brains, which process, integrate, and coordinate information received from the environment and make decisions on how to respond with the rest of the body.
The synsacrum is built from the lumbar fused with the sacral, some of the first sections of the caudal, and sometimes the last one or two sections of the thoracic vertebrae, depending on species (birds have altogether between 10 and 22 vertebrae). [9] Except for those of ostriches and rheas, pubic bones do not connect to each other, easing egg ...
Cross sectioned great grey owl specimen showing the extent of the body plumage, Zoological Museum, Copenhagen Skeleton of a Strigidae owl. While typical owls (hereafter referred to simply as owls) vary greatly in size, with the smallest species, the elf owl, being a hundredth the size of the largest, the Eurasian eagle-owl and Blakiston's fish owl, owls generally share an extremely similar ...
In two other species of owls with asymmetrical ears, the saw-whet owl and the long-eared owl, the asymmetry is achieved by different means: in saw whets, the skull is asymmetrical; in the long-eared owl, the skin structures lying near the ear form asymmetrical entrances to the ear canals, which is achieved by a horizontal membrane. Thus, ear ...
The supposed "giant barn owl" Basityto from the Early Eocene of Grafenmühle (Germany) was actually a crowned crane (Balearica); [16] the presumed "Easter Island barn owl", based on subfossil bones found on Rapa Nui, has turned out to be a procellarid; [17] and the specimen originally described as the fossilized Pliocene Lechusa stirtoni was ...
Verreaux's eagle-owl (Ketupa lactea), also commonly known as the milky eagle owl or giant eagle owl, [3] is a member of the family Strigidae. This species is widespread in sub-Saharan Africa . A member of the genus Ketupa , it is the largest African owl, measuring up to 66 cm (26 in) in total length.