Could this be a Hunt's bumblebee? It has a reddish patch on abdomen. It is not as large as the American Bumblebee I see in Texas but about 1/2 size.
No pic. It was wading in shallow water along South Platte river.
Yucca | Asparagaceae
Bleeding heart | Papaveraceae
Found this guy on the cherry creek trail while out for a run. I didn't have my phone with me unfortunately to take a picture.
Pink hardy ice plant | Aizoaceae
Found this guy on my run today on the Cherry Creek Trail.
Photo taken & sent to me by my son in Denver to add to the observations database. Taken on 05-16-2015 - at Cheery Creek, Denver, CO. this BCNH has been seen at this location for several days.
California poppy | Papaveraceae