Aerial insectivores -- birds that hunt for insect prey on the wing -- are declining across North America. Conserving these vulnerable species requires a good understanding of the factors impacting ...
The western counterpart of the tree swallow, the violet-green swallow has narrower wings and a shorter tail. This species frequently uses nest boxes. Polytypic (3 ssp., none separable in the field; ...
The audio version of this article is generated by AI-based technology. Mispronunciations can occur. We are working with our partners to continually review and improve the results. A member of the ...
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