In my part of the state, farmers plant large fields of sunflowers to attract mourning doves during the legal hunting season. Doves are delicious -I learned a lot about bird anatomy helping my mother clean ones my father brought home. The list of other birds that relish these seeds is lengthy, a short list includes ring-necked pheasants, quail bobolinks, goldfinches, meadowlarks, nuthatches and tufted titmice. Mammals, too, enjoy the seeds – many types of mice, ground squirrels, and chipmunks. As for deer, sadly they absolutely love all parts of the plants from the tender young stems and leaves to even the mature heads. The black seeded sunflower has a larger kernel than others and the outer hull is relatively soft for birds to crack. The U S Fish and Wildlife service rates them as the number one food for birds.
Birds and sunflowers

SC Public Radio