Black Woodpecker 3

Black Woodpecker 3

Observation - Black Woodpecker 3. Description: I've posted a few images of these birds (see http://www.ispotnature.org/node/420872 and http://www.ispotnature.org/node/418520) oddly dark coloured Green Woodpeckers. This one seemed to be associating with a immature bird (one if its fledglings?), also

I've posted a few images of these birds (see http://www.ispotnature.org/node/420872 and http://www.ispotnature.org/node/418520) oddly dark coloured Green Woodpeckers.

This one seemed to be associating with a immature bird (one if its fledglings?), also shown, which seemed of normal colour.

The theory that these are just dirty birds seems most likely to me but that pattern of dark seems very neat on this bird.