I'm knew to this website so bear with me. I've noticed some bees in my loft that appear to be entering through a hole made for a tv aerial. I've only seen 4-5 in the loft but they appear to be crawling under a wooden board that is lying on top of some insulation. I've attached a picture. So a) should I just leave them until they die in autumn b) should I lift the board to take a closer look and see how many there really are? c) have I identified the bees correctly? They have the black head, ginger thorax and black abdomen of bombus hypnorum but hardly any white hairs on their abdomen - is this normal?
Any help gratefully received