Yellow Blossom Pearly Mussel (Epioblasma florentina), Field Museum of Natural History, Chicago. No. 68453. Conservation status: extinct.

Epioblasma is the fourth largest genus of North Ameri...

Yellow Blossom Pearly Mussel (Epioblasma florentina), Field Museum of Natural History, Chicago. No. 68453. Conservation status: extinct.

Darwin's Frog (Rhinoderma darwinii), FMNH no. 40125 and others. Field Museum of Natural History, Chicago. Conservation status: vulnerable. Occurring in the forests of Argentina and Chile, this species...

Philippine Crocodile (Crocodilus mindorensis), FMNH catalogue no. 19891. Field Museum of Natural History, Chicago. Conservation status: critically endangered. Crocodilus mindorensis is the most enadan...

A workspace in the Birds Division of the Field Museum of Natural History in Chicago. Clockwise from upper left: a bird nest, bird skeleton, unidentified parrot and specimen storage boxes.

...

Owl parrot / Kakapo (Strigops habroptilus). Field Museum of Natural History, Chicago. Conservation status: critically endangered. The kakapo is the only flightless parrot in the world. It is also the...

Owl parrot / Kakapo (Strigops habroptilus). Field Museum of Natural History, Chicago. Conservation status: critically endangered. The kakapo is the only flightless parrot in the world. It is also the...

Huia (Heteralocha acutirostris). Conservation status: extinct. Field Museum of Natural History, Chicago.

California Condor (Gymnogyps californianus). Field Museum of Natural History, Chicago. Conservation status: critically endangered

Eskimo curlew (Numenius borealis). Field Museum of Natural History, Chicago. Conservation status: critically endangered. Once one of the most numerous of shorebirds, it has been over 40 years since th...

Passenger Pigeon (Ectopistes migratorius). Field Museum of Natural History, Chicago. Conservation status: extinct

Columbia River Tiger Beetle (Cicindela columbica), FMNH 900158?. Conservation status: endangered. Field Museum of Natural History, Chicago.

Testudo kleinmanni, Egyption Tortoise, FMNH no. 82667. Conservation status: critically endangered. Field Museum of Natural History, Chicago.

European Eel (Anguilla anguilla). Conservation status: critically endangered. Field Museum of Natural History, Chicago.

Evarra eigenmanni, FMNH 3682, paratype. Conservation status: extinct. Only specimen in existence. Field Museum of Natural History, Chicago.