You can create overwintering sites for bumblebees by leaving leaf litter and uncut bunched grasses in your yard, as well as large sections of untilled soil in your garden. They also seem to favor birdhouses that have not been cleaned out, rock walls, and woodpiles. If you do find an inhabited BB nest, please do not touch it or move it! It will be abandoned at the end of the summer. Xerces would love to hear about the bumblebee nests in your backyard.
Infographic for you, on how to create bumblebee habitat.
Let's bring 'em back!