Bumble Bees - Lists of the species, with biogeographic and distribution information. From the Natural History Museum, UK. - http://www.nhm.ac.uk/research-curation/projects/bombus/
Bombus-L - Listserv list - the biology of bumble bees discussion group. - http://www.beesource.com/bee-l/bombusl.htm
Bombus: Bumble Bees of Florida - General information, key to the state's species, photos, and reference list. - http://creatures.ifas.ufl.edu/misc/bees/bumble_bees.htm
Bumblebees (Bombus) - Introduction to this genus with photos and facts on individual species. - http://www.gardensafari.net/english/bumblebees.htm
Bumblebees - Pages about the natural history of bumblebees in general, and keys to identify species commonly found in the north-east of Scotland. - http://www.bumblebee.org/
Plants of Interest to Bumblebees - Lists of plants, from Tom Clothier's Garden Walk and Talk. - http://tomclothier.hort.net/page42.html
Bombus Species - Photographs of many different species, all on flowers. - http://cedarcreek.umn.edu/insects/album/025070002ap.html
Discover the Bumble Bee - Encouraging the bumblebee in domestic gardens and lawns. - http://www.netlink.co.uk/users/hercules/Bee.html
Bumble Bees Around the House - Factsheet from Clemson University on the interesting life cycle and benefits of bumble bees. Includes information on safety precautions to take near bees and bee conservation. - http://hgic.clemson.edu/factsheets/HGIC2500.htm