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BROWN HEADED COWBIRD

The brown headed cowbird parasitizes other birds by laying its eggs in their nests.  Other birds raise the cowbirds as their own and the cowbird nestlings outcompete those of the other species.  This brood parasitism can decrease the populations of songbirds by half.  The brown headed cowbird originally inhabited western North America but expanded its populations eastward when forests were cleared.  They prefer edge habitats so that the splitting of a large region of continuous forest into smaller habitats drastically increases the effect of cowbirds on forest birds.  Cowbirds feed on insects, seeds, and berries.

COWBIRD

BROWN HEADED COWBIRD

COWBIRD

COWBIRD

COWBIRD

BROWN HEADED COWBIRD

BROWN HEADED COWBIRD BROWN HEADED COWBIRD