GREEN WOODPECKER

I saw one today, while walking through a field on the edge of some woods. I didn't know what it was until I got home and looked it up. It must have heard us coming because it darted out of a tree and flew away. This was at a distance, and I only saw it from behind. Which was startling, because a rear view of a green woodpecker means a very large bird with a shocking bright yellow rump. I'd thought it would be as green underneath as it is on top - not so!