A type of Bumble Bee is now on the endangered species list as there are fewer and fewer of them found. It is the rusty patched Bumble Bee:
http://www.usatoday.com/story/tech/scie ... /96394450/
We have lots of bees around here in the Spring and Summer but I really never noticed anything about what type they may be. I know it hurts when they sting you!