As of 4/11/14
Queen and worker bumble bees can sting. Unlike a honey bee’s stinger a bumble bee’s stinger lacks barbs, so they can sting more than once. Bumblebee species are not normally aggressive, but will sting in defence of their nest, or if harmed. Female cuckoo bumble bees will aggressively attack host colony members, and sting the host queen, but will ignore other animals and humans unless disturbed.
They may not be aggressive,…But if you have ever been sting by one of these little beauty`s,…You`ll give them alot of room,……
Image taken in Norman,Oklahoma U.S.A.