Bombus Species
Photographs of many different species, all on flowers.
http://cedarcreek.umn.edu/insects/album/025070002ap.html
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
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/
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
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/
Bumblebees (Bombus)
Introduction to this genus with photos and facts on individual species.
http://www.gardensafari.net/english/bumblebees.htm
Discover the Bumble Bee
Encouraging the bumblebee in domestic gardens and lawns.
http://www.netlink.co.uk/users/hercules/Bee.html
Plants of Interest to Bumblebees
Lists of plants, from Tom Clothier's Garden Walk and Talk.
http://tomclothier.hort.net/page42.html