Brown-headed Cowbird

The Brown-headed Cowbird is a compact blackbird with a short tail and a thick, finch-like bill. Adult males are glossy black with a contrasting dark brown head, while females are plain grey-brown. Known famously as an obligate brood parasite, they build no nests of their own, instead laying eggs in the nests of other songbird species.

Uniform dark glossy black with structural iridescence appearing subtly greenish or purplish under direct light, typical of an adult male

Pennaceous vane transitioning to a slightly plumulaceous base, intact barbs with standard barbicels

Smooth, glossy, and slightly stiff vane typical of passerine body plumage

Solid glossy black coloration with structural iridescence and a slender rachis measuring approximately 4.5 inches

Open country, farmlands, edges of deciduous forests, brushy areas, and suburban lawns

Widespread across North America, breeding from southern Canada through the United States to Mexico

Acts as an obligate brood parasite affecting host songbird populations, serving as both a subject of intense avian study and a natural ecosystem component

Red-winged Blackbird and Common Grackle, though grackle body feathers are significantly larger with more pronounced iridescence

Because cowbirds follow bison herds historically, they evolved a nomadic lifestyle that precluded raising their own young, leading to their unique obligate brood parasitism strategy

Good condition with minor wear along the distal edge of the vane, showing intact barbs and a clean shaft

4 1/2 inches. Found on trail at lake Kenoza Massachusetts