Bumble bees are social bees and have annual nests, often found in old rodent burrows but also in compost and wood piles. A queen will emerge from hibernation in early spring and start her own colony. Worker bees develop first, followed by males and new queens towards the end of summer. A bumble bee nest often contains between 300 and 500 individuals. New mated queens will hibernate in the ground over winter; workers, males, and the old queen die in the fall. Bumble bees eat only nectar and pollen and do not produce large amounts of honey.
- Stinging Insects: Bumble Bees (K. Gardner, C. Klass, and N. Calderone, Cornell University Master Beekeeper Program)
- Bumblebee Foraging Preferences: Differences Between Species and Individuals (Laura Brodie, University of Aberdeen, www.bumblebee.org)
- Honey Bees, Bumble Bees, Carpenter Bees, and Sweat Bees (R. Wright, P. Mulder, and H. Reed, Oklahoma Cooperative Extension Service)
- Importation of Non-Native Bumble Bees into North America: Potential Consequences of Using Bombus terrestris and Other Non-Native Bumble Bees for Greenhouse Crop Pollination in Canada, Mexico, and the United States (K. Winter, L. Adams, R. Thorp, D. Inouye, L. Day, J. Ascher, and S. Buchmann, North American Pollinator Protection Campaign, August 2006)
- Bumble Bee Biology and Management (International Pollination Systems)
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