Almost a christmas card worthy, that one:)
I know they do it to keep warm, but I love how they puff themselves up:) In Norway, even in the cold winter, people are real good at feeding the birds, so they do quite well. I really enjoy watching the big flocks gathering in the bushes. And the noise they make! Winter can be so cold and dead, it is nice to see some creatures surviving here, except us.... :)
Oh, and if you wonder: No, I do NOT like winter!!!