Some bee or something

It's not especially warm in our yard this afternoon but the dandelions are overflowing with stuff for the bees and a few bees are there in the bar getting loaded. This one has been in the same flower for a half hour. I don't know if he'll be able to drive home.

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EDIT, a few hours later: I asked a local entomologist and he told me that this is a Sweat bee. I didn't even know such a thing existed a few years ago. :)