Maybe they are Tunisian bees? Were they shinny black like the bees in this video I took?: https://www.youtube.com/watch?v=YJwaUrGD8UU&t=35s Where did you find these bees, in the Southeastern US or Northern?I have your black butts open feeding today. I have asked several ppl what they are, and the answer I get on forums is feral. I assumed for the last 4 years that they were kept by a park ranger near my home, as this is the direction they fly. We also have jet black shiny bees from a tree about 3/8 mile from home. These I have some experience with, and if they interbreed with Italians, you can get some angry bees. We always called them German, but I really have no idea. They are very distinct. Dad and I hived a colony from a tree in the 80's and they were not any more aggressive than anyone else.