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 ...

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 ...

I never tire of watching the aerial acrobatics of swallows as they swoop over fields, darting back and forth to snap up flying insects. With their smooth, flowing flight and pointed wings, they are ...

As climate change worsens, spring temperatures come earlier in the year, cueing tree swallows to build their nests sooner. This leaves baby swallows vulnerable as the inevitable cold snap happens. “It ...

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, ...