White Feathers: The Nesting Lives of Tree Swallows

The surprising, rich life of tree swallows in nesting season—with Heinrich’s beautiful illustrations and photographs—by the acclaimed naturalist.

Heinrich is sparked one early spring day by a question: Why does a pair of swallows in a nest-box close to his Maine cabin show an unvarying preference for white feathers—not easily available nearby—as nest lining? He notices, too, the extreme aggressiveness of “his” swallows toward some other swallows of their own kind. And he wonders, given swall...