If you stood outside in any eastern Canadian city in January or February without a stitch of clothing on, you'd likely turn into a Popsicle in fairly short order. Instead, you find yourself donning a warm winter coat, thermal mitts and wool-lined boots. But what about the birds? Not all of them head to warmer climes in winter, so how do they cope in a frozen landscape during our long winter months? Actually, birds have an amazing number of behavioral and physiological adaptat