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

Under these drastically changing conditions, the struggle to survive favored the larger birds with deep, strong beaks for opening the hard seeds. Smaller finches with less-powerful beaks perished.

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 ...

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 ...