Warming temperatures from climate change cause tree swallows to nest up to two weeks earlier than they did in the 1970s, but early spring cold snaps can hinder nestlings' growth and survival, ...

Do Tree Swallows Use Birdhouses? Many backyard birders grow concerned when another species swoops into their bluebird boxes. A closer look at who’s moving in is warranted, since invasive species like ...

Early on a cool, smoky June morning, researchers Alexis Grinde and Annie Bracey load up with gear and strike out across a grassland south of Moorhead, Minnesota. They’re gathering data to better ...