i've been seeing these large dark bodied bees entering the hive all afternoon. One or two every minute. They're distinct in their loud buzzing and larger and dark bodies. They seem to be entering unimpeded by the guards, but when shocked this one to better identify it they pounced on it and quickly threw it off the entrance. I don't believe they're drones (I keep Carniolans) but I hope I'm mistaken. Any thoughts
