Tony LePrieur took these great photos of a huge Brown-headed Cowbird fledgling being fed by its foster parent, a male Yellow Warbler.
Brown-headed Cowbird being fed by a Yellow Warbler, Calgary, July 8, 2017. Photo by Tony LePrieur.
The warbler is off to find more food for its demanding foster child.
Brown-headed Cowbirds lay their eggs in other birds’ nests and often the other species does not recognize the difference and raises the young cowbird. For more photos of cowbirds with some other host species see these posts: