Internet links   ( Bumble Bee )

http://beespotter.mste.illinois.edu/
http://www.xerces.org/wp-content/uploads/2008/09/Eastern_Bumble_Bee.pdf

http://www.personal.psu.edu/hmh19/MidwestBombus.html

http://www.entomology.umn.edu/cues/pollinators/plants.html