Years ago we woke up one morning to find a huge "ball" that hummed in our tree out front! It literally happened overnight! We quickly realized it was made up of bees and my mom called an exterminator. Like you said, they didn't want to get involved. They told us to call the township office because they often know of different types of people to handle different tasks. It turns out they put her in touch with a bee keeper who was just thrilled to get them. He came dressed like an astronaut and was able to "unhook" the ball and cover it with something and then put the whole thing in the trunk of his car. You could hear crazy buzzing through the closed trunk door. He said they were honey bees and that the queen was deep down inside and everyone else was piled on top of her.