black & yellow winged . . . ???
I found this little guy [girl?] outside on the walk. Seems to be ailing or injured as it has barely moved in a day. Besides the yellow on the head, it has a yellow stripe across his butt. Interesting fuzzy legs that have little hooked ends.
San Diego area
This is a Yellow Faced Bumble Bee, Bombus vosnesenskii. BugGuide has some additional photos, but not much information.