Rose-breasted Grosbeak

Bursting with black, white, and rose-red, male Rose-breasted Grosbeaks are like an exclamation mark at your bird feeder or in your binoculars. Females and immatures are streaked brown and white with a bold face pattern and enormous bill. Look for these birds in forest edges and woodlands. Listen, too, for their distinctive voices. They sound like American Robins, but listen for an extra sweetness, as if the bird had operatic training; they also make a sharp chink like the squeak of a sneaker.

Researchers used mounted specimens of male Rose-breasted Grosbeaks to explore aggressive behavior. Live male birds attacked the white rump and flanks of the models, suggesting that the white markings are more important than the red chest in stimulating aggression. Rose-breasted Grosbeaks build such flimsy nests that eggs are often visible from below through the nest bottom. The male Rose-breasted Grosbeak takes a turn incubating the eggs for several hours during the day, while the female incubates the rest of the day and all night long. Both sexes sing quietly to each other when they exchange places. The male sometimes sings his normal song at full volume from inside the nest.