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Formerly - Guiraca caerulea
L. 6 3/4" (17 cm)
Immature Similar to female, but 1st winter birds are more rufous.
 Similar Species
This large Cardinaline Bunting is often mistaken for an Indigo Bunting, which does not have the rusty 'shoulders' seen as wing bars in flight, or the large beak as indicated by the name: grosbeak.
This species has in the past been placed in genus Guiraca
Shrubby fields, open habitat with scattered trees, scrub, thickets, cultivated lands, woodland edges, overgrown fields, hedgerows.
The diet includes insects, snails, spiders, seeds, grains, and fruits. Its large bill can manage large seeds, like corn, and large insects like grasshoppers.
The nest is built low in small trees and shrubs. It is a compact cup of bark, rootlets, twigs, and other fibrous material. The clutch consists of 3-5 pale blue eggs; incubation takes 11-12 days, followed by fledging at 9-10 days.
Blue Grosbeak nests are sometimes parasitized by Brown-headed Cowbirds.
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