Bird wiki:
>For other uses, see Bird (disambiguation). Many - see section below. Birds are bipedal, warm-blooded, egg-laying vertebrates characterized primarily by feathers, forelimbs modified as wings, and hollow bones. Birds range in size from the tiny hummingbirds to the huge Ostrich and Emu. Depending on taxonomic viewpoint, there are about 8,800â10,200 living bird species (plus about 120â130 that have become extinct in the span of human history) in the world, making them the most diverse class of terrestrial vertebrates.
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rest wiki:
[ has several different meanings. See:rest (music), a pause in a piece of music.rest (object), a support for a musket or billiards or snooker cue.rest (physics), the relation between two observers.rest as action, to relax, see recreation.The reserves of the Bank of England.In software engineering, REST is an acronym for Representational State Transfer.ReST also refers to the markup language, ReStructuredText.In chemistry a rest (abbreviated R) is a variable part of a molecule attached to a given core structure. See: Functional group and side chain.
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