Violet-Green Swallow is common throughout the western US as well as British Columbia and Alaska.
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Violet-green Swallow
Grand Canyon North Rim, AZ
July 18, 2006 ©John Schwarz
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Violet-green Swallow
Mount Lemmon (at 7000 feet elevation), Pima County, AZ
June 2, 2013 ©John Schwarz