Warming temperatures from climate change cause tree swallows to nest up to two weeks earlier than they did in the 1970s, but ...

ALONG BOULDER LAKE — Halle Lambeau had to duck just a bit when an adult tree swallow sprung for its next box and flew off, rattled by Lambeau’s effort to look inside the box for eggs. “You now have a ...

A new federal study says contamination from certain house products could be taking a toll on tree swallows in Minnesota and Wisconsin. The U.S. Geological Survey study focused on substances known as ...