Birds
In bird anatomy, the rump is the body immediately above the tail. The color of plumage on the rump is a characteristic widely used by ornithologists to distinguish between related species, and sometimes also between males and females of the same species. Similarly, the silhouette of the tailfan is a characteristic widely used for purposes of identification, particularly in the field.
Some birds have a food reservoir pouch in the esophagus that is known as a croup.
Read more about this topic: Rump (animal)
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“The air deals blows: surely too hard, too often?
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Dead leaves desert in thousands, outwards, upwards,
Numerous as birds; but the birds fly away....”
—Philip Larkin (1922–1986)
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“Novelists do not write as birds sing, by the push of nature. It is part of the job that there should be much routine and some daily stuff on the level of carpentry.”
—William Golding (b. 1911)