Demography, mating system and reproductive success ofthe Brown-headed Cowbird (Molothrus ater) at Delta Marsh,Manitoba

Brown-headed Cowbird (Molothrus ater) Science Article 13


The Brown-headed Cowbird (Molothrus ater) is anative North American icterid and the most commonobligate interspecific brood parasite in North America.Brood parasites lay their eggs in the nests of other birdspecies and all parental care, including incubation andfeeding is provided by the host species. The matingsystem of the cowbird is one of the most widely studiedaspects of its biology.

Bonnie Woolfenden, H. Lisle Gibbs and Spencer Sealy, UFS (Delta Marsh) Annual Report, Vol. 31, 1996

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