Possible reasons for dearth of bees; chemical spraying etc
Honey bees are dying all over the globe. Here's why! by Dan Eden for Viewzone
http://www.omninerd.com/comment/show/8406
http://maarec.cas.psu.edu/CCDPpt/RecGrowersUsingNeonics.pdf
http://www.bayer.com/en/Sustainability.aspx