This is a Daisy
Sometimes it is visited by flies
But bees also like it
This is Halictus ligatus
This is a species of Sweat Bee, and it is very very common (from southern Canada to northern Mexico, from Atlantic to Pacific (Gee, the traffic is terrific!)).
She has a diagnostic character, which is obvious in this photo.
What, still didn’t spot it? Here, try this
NB! There is another species with a similar character (H. poeyi), but because they are so hard to distinguish, populations south of Virginia are generally considered to be poeyi, and north are generally considered to be ligatus. Wish I could tell you taxonomy was simple. Sorry.