Very Small Owls

After evicting ants from the owl box last year ... and no owls, this year it has been colonized by bees. Not sure if these are Africanized or not. We were able to walk around underneath with no aggression, so perhaps we are just helping out the "good" bees. I am wondering if this bunch is from a swarming of the hives that the beekeeper down the street has. At this, point it is already past were I could do anything about it anyways.