New Garden Visitor

We get lots of birds in the garden, but recently we have had a new visitor -- a young Great Spotted Woodpecker. We've seen it quite a few times now, although this photo was taken back in July when it first appeared.

Apparently you can tell that it's a young bird by the red on it's head. According to the book I looked in juveniles have a red crown, whereas on adult males the red is on the nape of the neck and the females have no red on their head at all.