Picus viridis, the Green Woodpecker

It laughs (yaffles) a lot.

Here's a site where you can see a couple of prints of it:

http://www.birdsofbritain.co.uk/bird-guide/green-woodpecker.htm

Apparently, it's common in the British Isles.

Edit:

Faldage--you've gotta take a look at this photograph. The European green woodpecker is a very motley-looking bird:

http://www.gardensafari.net/english/pages/spechtg.htm

And a webpage of nickle stamps--this is rather quiet-looking page, but still interesting:

http://www.bird-stamps.org/species/99183.htm