Watercolor illustration of the nettle butterfly, in various life stages, on the leaves of a plant, with manuscript description, signed “M.P., 1824”

The New York Public Library states no known U.S. copyright for this item. Pinax admits it as US-PD only because the work predates 1900, making public domain near-certain worldwide; status outside the U.S. is not asserted and reuse elsewhere is the user's responsibility. Credit: From The New York Public Library.