We will soon begin to see some of Minnesota’s most-beloved creatures come out of hibernation. Different species of bats, bears, turtles and snakes all hibernate here, and many rely on more than warm weather to wake up. So how do animals know when it’s time to come out of hibernation? Garter snakes hibernate in the hundreds, and in some cases thousands. And when they wake up, it is like a squirmy ball of green spaghetti.