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 ...

A new study led by the University of Colorado at Boulder has shown the testosterone of male North American barn swallows skyrocketed early in the breeding season when their breast colors were ...