A male tree swallow gives a good yawn in the early morning light. This photo shows how wide a swallow can open its mouth when trying to capture flying insects. Credit: PHOTO BY BILL DANIELSON One of ...

Placement, construction, shape and material are essential nest considerations. Each species meets its own needs with its own style, developed over eons. Many bird species employ feathers in their ...

Concern about how climate change affects food security usually focuses on agriculture in resource-poor countries. But disruptions to weather patterns threaten food supplies for wildlife too. Walk ...

One of the great joys of spring is the first appearance of the tree swallows. In my yard, this event almost always occurs in the first week of April; this year was no exception. It was a close call, ...