The last Passenger Pigeon

Martha, died 93 years ago today at the Cincinnati zoo. The last of over a billion birds that once roamed America.
Treehugger says she's stuffed but not on display at the Smithsonian.
From RoadsideAmerica;

Martha spent her last years in the Cincinnati Zoo, in a pagoda aviary that has been restored. It's an official National Historic Landmark, currently wedged between Gorilla World, Cat House, and World of the Insect. Perched on a rock in front of the hut is a life-size bronze likeness of Martha. Inside are three stuffed Passenger Pigeons and a number of informative signs guaranteed to make you feel bad. Also here is the stuffed carcass of the last Carolina Parakeet, "Incus," who died in this same aviary in 1918, four years after Martha. That makes this place a uniquely bad spot in the history of bird extermination.