In a video of a sun-drenched yard, a cat relaxes in the branch of a tree, with a man-made birdbox above him. But rather than waiting for prey, he's getting a haircut—from a tiny bird, who is pulling ...

Robyn Bailey of Nestwatch at Cornell University wrote that “finding a bird’s nest offers a rare chance to discreetly witness the intricacies of breeding bird biology.” She goes on to say that if we ...