I saw a full grown groundhog 20 ft up in the crotch of a tree. It was directly across from my stand at eye level about 30 yds away. I know groundhogs don't climb trees, so the only other explanation would be that a hawk or another bird of prey grabbed him and took him up there. It still was wierd because he was a big boy, full grown, and completely alive and aware of his surroundings(not wounded or hurt from what I could see). He just sat there for the duration of my evening sit, stuck in a very small crotch in a very thin tree(the trunk was about 4-5" in diameter). When darkness fell I just left the woods. I returned the next morning to see if he was still there, but somehow he was gone...........maybe he just fell to the ground, or a hawk or an owl grabbed him.......Whatever got him had their hands full,.......he was a good 10-12 lbs.