Communal breeding in green woodhoopoes as a case for reciprocity


RECIPROCITY1, or reciprocal altruism2, and kin selection3 are concepts basic to sociobiology. Although both theories have been widely accepted4, little critical evidence exists for either5,6. Communal, or cooperatively breeding, birds are important organisms for testing these theories because nonbreeding helpers regularly provide aid to nestlings, such as… (More)
DOI: 10.1038/276496a0


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