Mountain chickadees in Boulder have evolved a different tune to avoid getting mixed up with their cousins, according to a new CU Boulder-led study published Oct. 9 in the Journal of Evolutionary ...
Mountain chickadees in Boulder have evolved a different tune to avoid getting mixed up with their cousins, according to a new CU Boulder-led study published Oct. 9 in the Journal of Evolutionary ...
Last week, a reader named Joy emailed me a photo of a bird that she couldn’t quite identify. One look at the photo, and I instantly understood both the observer's confusion and the mystery bird's ...
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