Violet-green swallow - Tachycineta thalassina.

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Photo credit: © Natural History Library / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: america, american, bird, conservation, country, frank, history, jacob, land, lands, national, natural, nature, np, park, parks, preserve, public, service, spring, usa, widlife, wilderness, wildlife, yellowstone