Add Yahoo as a preferred source to see more of our stories on Google. Mountain chickadees are unusual in having more complex calls than songs. Vladimir Pravosudov I approach a flock of mountain ...

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 ...

MILWAUKEE - One of Wisconsin's smallest and toughest birds just so happens to also be one of our first signs of spring. In January, a noticeable new sound can be heard across forests, neighborhoods ...

(The Conversation is an independent and nonprofit source of news, analysis and commentary from academic experts.) Sofia Marie Haley, University of Nevada, Reno (THE CONVERSATION) I approach a flock of ...