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A Dickcissel majestically sings from his perch on a sunflower stalk in the prairie at Ponca State Park. Dickcissels are named for their song which is a simple, dry "dick, dick, ciss, ciss, ciss." They live in tall grasslands including prairies, hayfields, and lightly grazed pastures, feeding on grains, seeds, and insects. They migrate to Central and South America in winter and gather in large flocks that continue to grow as the birds migrate. Winter roosts can grow to millions of birds. Ponca State Park, Nebraska.