I didn't read all the posts, so I'm not sure if anyone suggested that the little red handle on the automatic opener might be mistaken for a dangling flower by hummingbirds.
Some people paint the handle black to keep them from flying in the garage.
I don't know how many of the little buggers that fly in and then fly out but over a summer, I can tell you how many don't. They always seem to make it upstairs, into the storage area, above the garage but never seem to think to fly back downward.