Fertilized queens emerge from hibernation in early spring and start a new colony in abandoned rodent nests. About three weeks later workers emerge and take over gathering food - nectar and pollen - and cell building. The queen then concentrates her efforts on egg laying. As many as 250 workers are found in a nest. Males appear in summer, and males and females fly out of the nest to mate. Males are not allowed back into the nest and die soon after mating. The newly fertilized queens begin searching for a place to hibernate, but the workers and old queen die during winter.
- Bombus terrestris and lucorum (Laura Brodie, University of Aberdeen, www.bumblebee.org)
- 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)
- Buff-tailed bumble bee - Bombus terrestris - Family: Apidae (Natural England)
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