Smith: Nest boxes help put wind beneath birds' wings
Nest boxes help many species of birds, including eastern bluebirds, tree swallows and wood ducks, by providing protection ...
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Violet-Green Swallow
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 ...