A pair of eastern bluebirds. Source: Claudine Lamothe, via Flickr. Distributed under a CC BY-NC 2.0 license. Birdsong is often thought of as a male trait, but new research is changing that idea.
A pair of eastern bluebirds. Source: Claudine Lamothe, via Flickr. Distributed under a CC BY-NC 2.0 license. Birdsong is often thought of as a male trait, but new research is changing that idea.
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