Definition of allopreen
of a bird
: to preen or groom the skin or feathers of another bird On other occasions in succeeding weeks the female allopreened her mate, who sometimes solicited by putting his head down. — Lawrence Kilham, The American Crow and the Common Raven, 1991 Allopreening in birds is usually directed at the top of the head, a part of the body not easily reached by the recipient. — James F. Wittenberger, Animal Social Behavior, 1981
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