Well, I think that I have discovered the hummingbird feeder thief. It couldn't be anything but a raccoon! Two days ago when I awoke I found the feeder gone. I looked and on the ground the feeder was in pieces, and I swear that little sucker unscrewed it to the get the nectar out. I apologize to bats everywhere, unless of course it is the infamous count I doubt that they could have chewed the wire holding the feeder on the hook, took it on the ground and unscrewed the cylinder. I should have known. We put bungee cords on the trash can lids to keep them on and he hasn't figured out how to remove that yet.
Alas the feeder was damaged, chewing and a crack so it won't hold nectar anymore so I had to go out and buy a new one. Every try and buy a hummingbird feeder at the almost end of the season? Hard to find them but I managed.
Now I take the feeder in at night and replace it in the morning. Everyone is happy--except maybe Rocky raccoon.