Hi beeliners, As a semiochemical researcher who is new in the bee world, I am looking around for interesting research projects. One area which interests me concerns the potential of bees to locate new nests by odour. I understand from the literature that this has not been proven and is disputed by some sources (eg Alford). Has anyone got any info which may be of use to me. I have collected several bumblebee colonies and am now interested on getting some virgin queens, which I can mate and test their choices. What is the best way to obtain some queens which I could test this winter/autumn - I understand CO2 does the trick, but when should I start looking for queens and when should I CO2 them? I am in the UK and our timing may be different from the literature I have seen - Can anyone help me, Best wishes, Guy Poppy