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Brown-headed Cowbird and bison

Posted by Edwin Bowe on February 14, 2022 at 4:25 pm
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Location: Hayden Valley, Yellowstone National Park, WY
Brown-headed cowbirds have been associated with bison; they commonly walk on the ground immediately in front of the bison eating the insects and seeds stirred as the bison fed on the grasses. Brown-headed cowbirds are brood parasites, laying their eggs in the nests of other birds. This behavior was useful when the cowbirds followed the great bison herds and were not in one place long enough to raise their own young.

Not the “typical” bird photograph, this image shows a brown-headed cowbird “hitch-hiking” on the bison and gives some perspective on the sizes of the bird and the bison.