Ingenuity of Animals in Winter

Depending on where you live, winter can be tough to get through.  It’s cold, it gets dark early, the weather’s messy.  You can head South  — or you can just turn up the heat and try not to get depressed.  But animals – other animals, that is – have winter survival tricks you wouldn’t believe.  So maybe we should get some winter survival lessons from them? Naturalist Bernd Heinrich tells says that animal winter survival is a marvel.