<p>A violet-green swallow perches on a fence post.</p>
<p>Violet-green swallow</p>
<ul><li>Keywords: yellowstone national park; birds; passiferomes; jacob w. frank; yellowstone; bird; spring; wildlife; Tachycineta thalassina; violet-green swallow; 20170616-jwf-3051</li></ul>
Jacob W. Frank
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