Brown-headed Cowbird fledgling
being fed by Yellow Warbler
While birding at Humber Bay Park East in Toronto on 10 July 2011 we observed this young Brown-headed Cowbird, Molothrus ater (one of two) being fed by a male Yellow Warbler, Dendroica petechia. When we observed this activity we never once saw a female Yellow Warbler so we concluded that for whatever reason the male was left to satisfy these gargantuan offspring alone. It was a non-stop feeding frenzy during the time we watched with two begging, vociferous, belligerent cowbirds giving the warbler no rest.