Native Pollinator Outreach
Overwintered queen bumble bees search for nesting spots in early spring. One can provide them with a nesting site by putting one or more bumble bee boxes in your garden. If you are lucky (about 30% of the time) they will choose your box and raise their colony there.
Links:
Bumble bee research at the University of Arkansas
Bumble Bee Nests for Gardeners
Bumble bee box plans by R. Welland from http://www.stack.nl/~wjmb/interests/
Interior view of a bumble bee nest box
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