Way back in December 2010 I blogged about a Blackbird that was spending time in my garden. Nothing unusual, except that Mr White, as I christened him, was a Blackbird with abnormal plumage in that he had more white in than normal (see link here).
The BTO run the very successful Garden Birdwatch Scheme, of which I am a member, and in 2011 they also started a survey to try and get an idea about how widespread these abnormalities are. Today I received an update, which I thought I'd share with you.
Here's the link.