Environmental change and the distributions of British bumble bees (Bombus Latr.)

Paul H. Williams

Some species of organisms are considerably more widespread than others. Bumble bees are no exception, and differences between the distributions of the various species found in Britain have often been noted by natural historians. My own collecting trips have yielded six or seven species common to most of the localities I visited, while I found other species only in the far south of the country or only in the west and north.