April

Range of Baltimore and Bullock's Orioles

The peak of oriole migration, for Bullock's and Baltimore orioles both, occurs from mid-April through mid-May.

The first Baltimore orioles are reaching Texas, and by month's end, a few are reaching the central states.

Bullock's orioles are starting their migration through southern Arizona and California and up the coast. Breeding begins as soon as birds arrive.

 

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