Red Macaws fiercely defend their nest from intruding Toucans with intensity and flair.

A Baltimore oriole nest made of mostly horse hair, and only horse hair, is the best bird nest I have ever seen. It was found in a tree in the yard of a friend. Alex, who showed me the nest, lives on ...

Two summers ago, a patient looking out his Belgian-hospital window spied in a tree an odd, abandoned magpie nest of plastic and wire. He had, by coincidence, just read a newspaper article about a ...