The Pacific Northwest Bumble Bee Atlas is a multi-state effort to inventory and monitor native bumble bees. The first two training modules for the project have significant amounts of material about bees and their natural history.
To access, click the link below, then click on TRAINING MODULES, LOG ON (logging on does not obligate you to participate in the project), view first two modules.
https://www.pnwbumblebeeatlas.org/about.html# (click on training modules)