When going for walks in late July, much of the route is spent looking at summer wildflowers; many still in bloom while others have gone to seed. New ones are seen each day. In the woods, more moisture ...

Tree swallows in the northern U.S. and Canada face the greatest risk from climate change despite responding to temperature ...

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, ...

The late July morning is fairly cool and calm with a forecast of a hot afternoon. It is a pleasant time to walk. Along my usual road route, I pass plenty of wildflowers. Fireweed and milkweed still ...

Across the board, tree swallow populations have similar sensitivity to warming amid climate change, but different abilities ...

A new Colorado State University study of the interior U.S. West has found that tree ranges are generally contracting in response to climate change but not expanding into cooler, wetter ...