Once leaves drop in the fall, spotting nests in deciduous trees is easy. But birds likely didn’t build every structure you see: North American tree squirrels also construct treetop nests, called dreys ...

We love the thought of birds nesting in our yards. The thought that such a small creature could feel safe enough in our presence to raise its young is heartwarming, indeed — but not all clusters of ...

To some, it may be common sense, but to others, they might think those leftover leaves are randomly piled together and stuck ...