I have lots of differant types of Bumbles that crusie my yard during the summer. I have yet to try and figure out who they are. Are there any good color reference sheets out there? I don't what to be dragging a book around, but a good plastic coated sheet that I could keep on my deck would be fantastic. Also, anybody had much luck with Bumble houses? I want to start a couple, but have read that they are not very successful.