La cola o rabo es el extremo posterior del cuerpo de un animal, especialmente cuando este forma un apéndice flexible y distinguible del torso. Las colas son casi exclusivas de los vertebrados; algunos invertebrados, sin embargo, tienen apéndices similares a colas, como la del escorpión o la del colémbolo.

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The tail is the section at the rear end of an animal's body; in general, the term refers to a distinct, flexible appendage to the torso. It is the part of the body that corresponds roughly to the sacrum and coccyx in mammals, reptiles, and birds. While tails are primarily a feature of vertebrates, some invertebrates including scorpions and springtails, as well as snails and slugs, have tail-like appendages that are sometimes referred to as tails. Tailed objects are sometimes referred to as "caudate" and the part of the body associated with or proximal to the tail are given the adjective "caudal".

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