We may receive a commission on purchases made from links. For avid birdwatchers, nothing completes a backyard better than the sight of colorful birds flying from tree to tree. And more so during ...

Natural predators come in all sizes, shapes and classes. There are generalists that eat whatever they can get a hold of to specialists that just hunt and consume certain species in a particular way.

Add Yahoo as a preferred source to see more of our stories on Google. A tree swallow is shown in Lido Beach, N.Y. (Bruce Bennett/Getty Images - image credit) In an effort to help tree swallows find ...