Posted: 17/06/2015 at 20:26
Thanks for info pansyface. There are no lime trees around our garden at all. I just wondered if the bigger bumbles were killing the little ones. My computer is playing up so can't upload photos, but they are definitely two different variety of bee, or is it bees!
Dove's idea of sick bees being removed from nest is a good suggestion, though there seems to be too many unless the hive is infected.