A bumblebee with a taste for high living

Sandy, Bedfordshire A queen hit the bullseye – a 2.8cm hole in our nestbox – and there is a clearly active colony of tree bumblebees in residenceSince the start of the millennium, a new tune for summer has been spreading north. It was first picked up in Wiltshire; within a decade, it had reached southern Scotland. I can hear it from the bathroom, the bedroom, or standing under the eaves at the back door. The sound is not discernibly different from that made by the maker’s neare