<p>a small brownish bird in a person's hand</p>
<p>An avian ecologist holds a Swainson's thrush before releasing it after collecting measurements and blood samples on May 31, 2019.</p>
<ul><li>Keywords: birding; bird; avian ecologist; migratory birds; research; data; swainson's thrush</li></ul>
NPS Photo / Emily Mesner
<a rel="nofollow" class="external text" href="https://npgallery.nps.gov/">NPGallery</a>