Brown-headed Cowbirds have a bad reputation. A lot of birders don’t like them because they seem to be shirking their parental duties. Because they are obligate brood parasites—they don’t build their own nests, and only lay their eggs in the nests of other species—we accuse them of taking advantage of other species by forcing them into doing all the work of feeding a hungry nestling. It’s unfair. We’re indignant.