Robbing looked like take over?

[dprater]

One of my hives had maybe 400 bees on the outside today, thought they were swarming. Got up close and half of them were fanning like the when they say Q is here. I did look for a Q in the group and thats when I saw fighting. They were trying to get under the top cover. I have robbing screens on and I think that helped but a little fighting was going on at the robbing screen so I closed up even that entrance for today, maybe tomorrow too?

Do you think the robbing screen fooled them? I know I left some of the bees that belong in that hive out side and some died but I did not know what else to do. Any ideas on what went on?

dan

[tefer2]

When we install robber screens it is after all bees are done flying for the day.
It's usually after dark or before light in the morning.
It still takes a few days for them to get used to it.