New to beekeeping...and had been doing well until yesterday! My hive was about two months in, filling up the second brood box nicely, happy queen, etc...but after I put some sugar syrup inside the inner feeder yesterday morning, robbing began a few hours later. My guess is I may have not have closed the outer cover all the way somehow. I don't know. Anyway, today I reduced the entrance and had a wet sheet over the hive all day. Activity has definitely slowed and the angry buzzing has quieted.
I have two questions...1. What do I do next? Leave the sheet for a few days and then examine the hive maybe? And 2. There's a huge clump on the outside of the screened bottom board...should that be alarming? They must be mostly my bees bc lots are carrying pollen.
No idea who the robbers are bc I only have one hive. Guessing they are wild or maybe a neighbor has bees that I don't know about. So distressing!