Here in spokane, Washington, USA we had a snowy day, about 10 inches. I setup a bird feeder last spring, and am trying to keep the big flock of birds that feed there well fed this winter. I put a bucket heater in the fountain so they have fresh water, it has been down to -15 F this winter, and it keeps on running.
Here is a finch enjoying lunch this afternoon. They do keep their feathers puffed up a little to keep warm. The feeder was covered with about two dozen of them this morning. I used my 100-400mm l hand held with flash and better beamer. With the wind blowing, its not as sharp as it could be, but it was cold and blowing snow right into my lens, so I snapped off a couple and gave it up.
Canon 1D MK III, 100-400mm L @ 400mm, 1/250 sec with flash, ISO 200.