Marsh Tern from Birds of America (1827) by John James Audubon (1785 - 1851), etched by Robert Havell (1793 - 1878). Original… https://www.rawpixel.com/image/277361/free-illustration-image-audubon-birds-america-public-domain-1800sFree Image from public domain licenseMarsh Tern (Hydrochelidon fluviatilis) illustrated by Elizabeth Gould (1804–1841) for John Gould’s (1804-1881)… https://www.rawpixel.com/image/321393/free-illustration-image-bird-tern-australiaFree Image from public domain license279. Marsh Tern (Sterna anglica) 280. Roseate Tern (Sterna dougalli) illustration from Zoology of New York (1842–1844)… https://www.rawpixel.com/image/329460/free-illustration-image-birds-new-york-bird-zoologyFree Image from public domain license