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Very nice. The "sky" fooled me until I saw your specs.
As for flowers good for nectar feeders, i.e. insects to photograph, as well as feeding local populations, this season I have been impressed with Wild Carrot Daucus carota. This has other common names, such as Queen's Lace. It also looks very attractive in our garden.
Of course, the seed heads of your sunflowers will be very popular with birds.