Birds like northern cardinals, rose-breasted grosbeaks, evening grosbeaks and purple finches have thick, short beaks designed ...

thick beak. The ubiquitous raven croak can carry for more than a mile. It is throaty and rasping, unlike the American crow’s shrill caw. While the croak is the most recognizable call ravens use, it’s ...

In Alaska during the mid-1990s, bird experts noticed an uptick in overgrown, warped beaks among black-capped chickadees. Now, using high-throughput RNA sequencing, researchers at the University of ...