While taking photos of the St. Olaf Memorial Chime Tower on Wednesday, I noticed the bumblebees going in and out of these roses. I was abble to get close enough for a few macro photos, as they completely ignored me. I was happy to get one photo in which the wings of the bumblebee are visible. The Wikipedia entry on bumblebee says:
Queen and worker bumblebees can sting, but unlike a honey bee’s, a bumblebee’s stinger lacks barbs, so they can sting more than once. Bumblebee species are normally non-aggressive, but will sting in defense of their nest, or if harmed.