Martha, the last passenger pigeon, mounted in a display case in the National Museum of Natural History, June, 2015. Display caption: "Passenger Pigeon (Martha) / Specimen USNM 223979/236650 / collected 1914 / The last known Passenger Pigeon, Martha (named for Martha Washington), died at the Cincinnati Zoological Garden in 1914. Her body was frozen in a block of ice and shipped by train to the Smithsonian Institution, where she is now part of the research collection and not normally on view."