Woodchucks are called groundhogs and whistle pigs for a good reason: they spend six months gorging themselves before going into hibernation. If they don’t double their weight, they might not survive the winter. (Thanks to Chris Mayer for sharing her expertise and Ariana van den Akker for her photography.)
Why is it so maddeningly difficult to keep squirrels off birdfeeders? After all, they’re just rodents with brains the size of a ping-pong ball. Squirrels are such amazing problem-solvers because they’re observant, social, experimental and persistent.
Most mammals are only active after dark, so it’s harder to get to know them than, say, birds, which are active and conspicuous during the day. But you can figure out how mammals like white-tailed deer spend their time by noticing subtle signs of their behavior.