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・ Bird control spike
・ Bird Cove
・ Bird Creek
・ Bird Creek (Piney River)
・ Bird Day
・ Bird dog
・ Bird Dog (album)
・ Bird dog (disambiguation)
・ Bird Dog (song)
・ Bird Eater
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Bird feet and legs
・ Bird Fiord Formation
・ Bird flight
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・ Bird Flu (song)
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・ BIRD Foundation
・ Bird Gets the Worm
・ Bird Gets the Worm (album)
・ Bird Girl
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・ Bird goddess
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Bird feet and legs : ウィキペディア英語版
Bird feet and legs

(詳細はdigitigrade animals, which means that they walk on their toes, not the entire feet.〔〔〔〔 Some of their lower bones of the foot〔 (distals〔 and most〔〔 of metatarsals〔) are fused to form tarsometatarsus〔〔 – a third segment of the leg, specific to birds. The upper bones of the foot〔 (proximals) in turn are fused with the tibia to form tibiotarsus,〔〔 as over time the centralia disappeared.〔 The fibula is also reduced.〔〔〔
The legs are attached to a very strong assembly consisting of the pelvic girdle extensively fused with the uniform spinal bone (also specific to birds) called the ''synsacrum'', built from some of the fused bones.〔〔〔〔
Bird leg and feet anatomy is very diverse. It reveals many accommodations to perform a wide variety of functions.〔〔〔〔〔〔
==Skeleton==


抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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