Kids and educators intrigued by my book The Bumblebee Queen, there’s finally a truly great publication I can send you to for follow up. This has been on my wish-some-expert-would-write-this dream list for years. Hooray for USDA and all the authors involved! Fisheries biologist John Magee in NH, thanks for giving me the heads up on it.
The publication is a free, downloadable pdf, you can store it on your computer, ipad, iphone, whatever.
http://www.fs.fed.us/wildflowers/pollinators/documents/BumbleBeeGuide2011.pdf