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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 ...
In advanced sauropods ("neosauropods") the vertebrae of the lower back and hip regions show signs of air sacs. In early sauropods only the cervical (neck) vertebrae show these features. If the developmental sequence found in bird embryos is a guide, air sacs actually evolved before the channels in the skeleton that accommodate them in later forms.
The Elf Owl was so small Mark was able to hold the owl with one hand. He's so small he doesn't seem real. He looks like the most precious owl statue, one that is super rare.
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As an example, the great tit, a European songbird, uses such a signal to call on nearby birds to harass a perched bird of prey, such as an owl. This call occurs in the 4.5kHz range, [66] and carries over long distances. However, when such prey species are in flight, they employ an alarm signal in the 7–8 kHz range.