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 ...

City living sure can be nuts. Dozens of Manhattan squirrels were forced to run for their lives and left “starving to death” ...

Clearly, the gray squirrel was spending only a few seconds on each acorn. The animal removed the cap with its lower incisors, then proceeded to chip away at the outer shell and the nutritious kernel ...