Only seemed interested in Dalea pinnata.
Likely C. howardi. On Dalea pinnata
If these are still different species please indicate. Including the all together as one observation - assuming they're all the same species - for ease of having multiple reference photos for identification
@sturnella from the bioblitz in Santa Rosa two years ago. Can you ID this?
At least ten drones observed, some at Symphyotrichum cordifolium.
On New England aster