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Bird Details

Perching Perching

Bronzed Cowbird

Molothrus aeneus

Bronzed Cowbird
copyright Jim Burns
Length: 9 in. (22 cm)
Occurring in open woodlands, feeding lots, and vegetated suburban areas, it usually flocks with other blackbird species. This cowbird often feeds on the ground where it eats grain and seeds. A brood parasite, the female cowbird puts an egg in each of several nests. It has been recorded parasitizing at least 77 other bird species, but most commonly those of Hooded Orioles. The female cowbirds use their bills to pierce the eggs of the host species or other cowbird species already in the selected nest before depositing their own egg. The host species then feeds and raises this relatively huge young. The four-digit banding code is BROC.

Riparian / River forest
Riparian / River forest

Shrubs
Shrubs

Urban city
Urban city

Agricultural
Agricultural

Mesquite bosque
Mesquite bosque

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Share to Google Classroom

Be part of Ask A Biologist

by volunteering, or simply sending us feedback on the site. Scientists, teachers, writers, illustrators, and translators are all important to the program. If you are interested in helping with the website we have a Volunteer page to get the process started.