On 24-Jul-15, at 2:17 PM, Charles Linder wrote:

>  Assuming a flight range of as much as 5 miles,  wouldn't it take a  
> lot longer than 10 years to see a 400km shift??

Hi Charles and all

Maybe the bumbles became extinct in the 400 km range, rather than  
migrating.

Bob Darrell
Caledon Ontario
Canada
44N80W

             ***********************************************
The BEE-L mailing list is powered by L-Soft's renowned
LISTSERV(R) list management software.  For more information, go to:
http://www.lsoft.com/LISTSERV-powered.html