 Couper is well known for his winged figures, such as the "Recording Angel" at the Couper family plot in Elmwood Cemetery in Norfolk and allegorical figures, such as "Psyche" and "A Crown for the Victor", in the collection of the Montclair Art Museum.Couper lived much of his life in Montclair, New Jersey, where he built a large neoclassical villa he named "Poggioridente" or "laughing knoll".He had a home in Cortland, New York, as well.