HRP's technique works for me.
I just do things gradually.. meaning if I bring my camera from home into bitter cold, I'll wait a few minutes before shooting. So far I have not had a problem.
Decent duck shot, I find birds to be one of the most difficult subjects to shoot.
The best bird shots will be tack sharp (especially the eyes) and this is very difficult indeed. 1/500 - 1/1000 would be my minimum shutterspeed for birds in flight.