
Brown-headed Cowbird
Kingdom: Animalia, Phylum: Chordata, Class: Aves, Order: Passeriformes, Family: Icteridae, Genus: Molothrus, Species: M. ater
Family: Icteridae (Blackbirds, Orioles, and Allies)
- Shape
- Symmetrical vane with a rounded tip and a slightly curved, elongated overall outline.
- Size
- Approximately 2 to 3 inches long, consistent with a medium-sized passerine body feather.
- Rarity
- Very Common
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Description
The Brown-headed Cowbird is a stocky, blackbird-sized species with a short, thick seed-eating bill. Males are glossy black with a distinct rich brown head, while females are a plain grayish-brown overall. They are notorious obligate brood parasites, laying their eggs in the nests of other songbirds.
Colour & Pattern
Rich dark brown to nearly black coloration with a uniform matte appearance and subtle glossy sheen under direct light.
Barb Structure
Pennaceous upper portion with tightly interlocked barbs and barbicels, transitioning to a slightly more plumulaceous base.
Texture & Surface
Smooth, slightly stiff along the main vane, with a soft downy base; overall matte to satin finish.
Key Features
Uniform dark brown to black coloration, medium-small passerine contour shape, pale calamus/base of the rachis.
Habitat
Open country, agricultural fields, pastures, edges of woods, and suburban residential areas.
Geographic Range
Widespread across North America, breeding from southern Canada down through the United States to Mexico, with year-round residency in the southern and western portions.
Ecological Role
Acts as an obligate brood parasite that can significantly impact the reproductive success of host songbird species, sometimes leading to conservation concerns for vulnerable hosts.
Similar Species
Red-winged Blackbird body feathers or European Starling feathers, which typically show more iridescence or spotting.
Interesting Facts
Brown-headed Cowbirds do not build their own nests or raise their young. Females monitor host nests, remove a host egg, and replace it with their own, leaving other bird species to raise their chicks.
Condition Notes
Good condition with intact barbs and minimal fraying at the edges.
Notes
Found in Raleigh NC