Along its red beak, the bird has a faded flesh-toned red that ... Most importantly, you can identify the duck with the ear-piercing calls. After all, it’s called the whistling duck for a reason!

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 ...