cowbirdEtymologyFrom cow + bird, as they are often seen near cattle, feeding on insects stirred up by the hooves and those attracted to the manure, as well as fermented grains from the manure.cowbird means any bird of the genus Molothrus. The cowbirds are brood parasites. Lexicurio rates it Sui generis — a strength score of 87 out of 100.nounAny bird of the genus Molothrus. The cowbirds are brood parasites.