Friday, December 1, 2017

Bronzed Cowbird

Bronzed Cowbirds range from the southwestern United States and southern Texas south to Colombia. Like our common Brown-headed Cowbird, this species is a brood parasite, laying its eggs in host birds’ nests. Bronzed Cowbirds are slightly larger than Brown-headed Cowbirds. Their host species are likewise slightly larger. Bronzed Cowbirds may be more particular in its selection of hosts, but the species is not well studied (Ellison and Lowther 2009). Judging by the ruffed nape of the male in this photo, their courtship displays may be similar. Little is known about the interaction between the two cowbirds or how the presence of both species is affected as the Bronzed Cowbird expands its range across the southern United States. 

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