Guide to North American Birds

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Photo: Garth McElroy/Vireo

Evening Grosbeak

Coccothraustes vespertinus

This chunky, big-billed finch wanders widely in winter, descending on bird feeders in colorful, noisy flocks, to thrill feeder-watchers and to consume prodigious amounts of sunflower seeds. Originally a western bird, almost unknown east of the Great Lakes before the 1890s, it now breeds commonly east to New England and the Maritime Provinces. Its eastward spread may have been helped by both the planting of box elders (a favorite food tree) across northern prairies, and the abundance of bird feeders in the Northeast.

Conservation status	Extended its breeding range eastward during the late 19th century and early 20th century. In recent decades, eastern population has declined again, but reasons are poorly understood.
Family	Finches
Habitat	Conifer forests; in winter, box elders and other maples, also fruiting shrubs. Breeds in coniferous and mixed forests; often associated with spruce and fir in northern forest, with pines in western mountains. In migration and winter, may be equally common in deciduous groves in woodlands and semi-open country.

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Feeding Behavior

Forages mostly in trees and shrubs, sometimes on ground. Except when nesting, usually forages in flocks.

Eggs

3-4, sometimes 2-5. Pale blue to blue-green, blotched with brown, gray, purple. Incubation is by female only, about 11-14 days. Male may feed female during incubation. Young: Both parents feed the nestlings. Young leave the nest about 2 weeks after hatching. 1 or 2 broods per year.

Young

Both parents feed the nestlings. Young leave the nest about 2 weeks after hatching. 1 or 2 broods per year.

Diet

Mostly seeds, some berries and insects. Seeds make up majority of diet, especially seeds of box elder, ash, maple, locust, and other trees. Also feeds on buds of deciduous trees, berries, small fruits, weed seeds. Will feed on oozing maple sap. Eats some insects in summer. At bird feeders, very fond of sunflower seeds. Will eat fine gravel for minerals and salts. Huge bill allows it to crack large seeds with ease.

Nesting

In courtship, male "dances" with head and tail raised, wings drooped and vibrating, as he swivels back and forth. Male frequently feeds female. In another courtship display, both members of a pair may bow alternately. Nest: Usual site is on horizontal branch (often well out from trunk) or in vertical fork of tree. Height varies, usually 20-60' above ground, can be 10-100' up. Nest (built by female) is a rather loosely made cup of twigs, lined with fine grass, moss, rootlets, pine needles.

Illustration © David Allen Sibley.
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Text © Kenn Kaufman, adapted from
Lives of North American Birds

Migration

Winter range in East very irregular, large numbers moving far south in some winters, little apparent movement in others. Such invasions have become smaller and less frequent in recent years. In the West, occasionally invades lowlands from nesting areas in mountains.

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Migration

All Seasons - Common
All Seasons - Uncommon
Breeding - Common
Breeding - Uncommon
Winter - Common
Winter - Uncommon
Migration - Common
Migration - Uncommon

Songs and Calls

Song a series of short, musical whistles. Call note similar to the chirp of the House Sparrow but louder and more ringing.

Audio © Lang Elliott, Bob McGuire, Kevin Colver, Martyn Stewart and others.
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How climate change could affect this bird's range

In the broadest and most detailed study of its kind, Audubon scientists have used hundreds of thousands of citizen-science observations and sophisticated climate models to predict how birds in the U.S. and Canada will react to climate change.

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