For anyone interested in bumble bees and pollinator conservation, consider joining your local bumble bee atlas. A project from the Xerces Society and state wildlife management organizations, it allows citizen scientists to go out and look for bumble bees to help establish baseline population data for your area. It's really easy and a great summer project to do with kids or a group of friends and will help you learn about the bumble bees in your area while contributing important information to help us all learn more about bumble bees and the struggles they face. 20 states are currently participating in the project.
https://www.bumblebeeatlas.org/