First post here, so I hope this is ok!
Great posts I've looked through so far, and a lovely website depicting the various species.
I have spotted the following on my regular walk to work, I saw one the other day but didn't manage to grab a photo, however today I was successful.
Is it particularly rare? I have never seen one with quite these colourings before...
![Image](http://i58.tinypic.com/1o1w8y.png)
Click for full size