Last week I removed one shallow super from two different hives. I treated both hives the same way: I opened the hive, put a bee escape into the oval hole in the center of the inner cover, then put the super I wanted to remove on top of the inner cover and closed the hive. After two days there were no bees at all in the super on one hive ... but the super on the other hive was still very full of bees. I wonder why? It's like one of the escapes worked, but the other one didn't -- even though they both look the same to me.
The frames in both supers were pretty much completely full and completely capped -- except for a few uncapped cells on the outside side of the outside frames. The escapes both look "fine." I don't notice, for example, a larger gap between the "springs" on either one.
I would think 48 hours would be more than enough time for the bees to clear out (as they did on the one hive). So what would explain the one escape not working like the other one?