For those of you interested in native bees, there's a new collaborative citizen science project to document occurrences of those big and charismatic buzzers, the bumble bees. At Bumble Bee Watch you can upload photos of bumble bees, learn ID, and check out recorded sightings in your area! I'm sure I'll be adding some photos to their database soon!
Also, another citizen science project occurring locally is The Bees' Needs. Through it you can help participate in a study documenting wood nesting bee species all along the Front Range. Details on both studies can be found on their websites.
I am a Postdoctoral Associate at CU-Boulder and have lead a number of projects studying patterns of native bee diversity in Colorado. Please enjoy your visit and contact me if you have any questions.