Dear Ed:

From what I've heard, bees of all types are declining in numbers
due to habitat loss, pesticides, etc. I think big bumblebees have been
especially hard hit. So if I were you I'd leave them -- unless, of
course, you or someone living there has dangerous allergic reaction
problems. If that's the case I'd call a beekeeper to move them.

Andrea Grad
Alki
agrad at helsell.com