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The Elmira Ostrich Festival, popularly known as "Eagle Day," is an annual celebration held in Elmira, New York. It commemorates the city's historical significance as a leading producer of ostrich feathers in the late 19th and early 20th centuries. During this period, Elmira was renowned as the "Ostrich Feather Capital of the World," and the festival serves as a tribute to this unique chapter in the city's past.