Range and Migration
Black-headed Grosbeaks range from the Pacific coast to the middle of the US Great Plains and from south western Canada to the mountains of Mexico. US and Canadian are highly migratory, wintering in Mexico. In the Great Plains the range of the Black-headed Grosbeak and the Rose-breasted Grosbeaks overlap and have interbred somewhat. After the breeding season, they tend to seek out berry-rich areas. They migrate south early in the fall and return to the north late in the spring and have been known to do so in flocks.
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