While it’s not a solid black, the dark plumage has brown and gray shades that help the bird blend into rocky backgrounds. The dark plumage makes the bright orange-red beak with a yellowish tip ...

Atlantic puffins’ beaks are more reminiscent of birds that live in the rainforest than on chilly cliffs. Bright orange or red, with blue and white streaks, it’s obvious why they’ve been ...

The discovery has perplexed avian experts, too, creating an enduring mystery about what might have made a white bird turn bright orange. Julie Maggert, a snowy owl enthusiast, heard of Mr. Diller ...