Atitlan Grebe (Podilymbus gigas), Field Museum of Natural History, Chicago. No. 97557. Conservation status: extinct.

The Atitlan grebe, also known as the poc, was a large, flightless water b...

Cuban Ivory-Billed Woodpecker (Campephilus principalis bairdii), Field Museum of Natural History, Chicago. No. 41820. Conservation status: extinct.

Originally described as a subspecies of th...

A tray of Passenger Pigeon skins, with other specimens (Ectopistes migratorius), at the Field Museum of Natural History, Chicago. Conservation status: extinct. On 14 September 1914, the last Passenger...

A Passenger Pigeon (Ectopistes migratorius) egg at the Field Museum of Natural History, Chicago. Conservation status: extinct. On 14 September 1914, the last Passenger Pigeon died in a cage in Cincinn...

Polyodon spathula, American Paddlefish, FMNH no. 98248. Conservation status: vulnerable. Field Museum of Natural History, Chicago.

Atlantic Bluefin Tuna (Thunnus thynnus), FMNH no. 43993. Conservation status: endangered. Field Museum of Natural History, Chicago.

Camiguin Hanging-Parrot (Loriculus camiguinensis). Field Museum of Natural History, Chicago. The specimens in this drawer, collected in the 1960s, are labelled Loriculus philippensis. However, field r...

Eggshells in the Birds Division of the Field Museum of Natural History, Chicago.

As biologists describe new species and add to our understanding of the interrelated nature of life on Earth...

Left to right: Gray-breasted Wood-Wren(Henicorhina leucophrys), White-breasted Wood-Wren (H. leucosticta tropaea), Bar-winged wood-wren (Henicorhina leucoptera). Field Museum of Natural History, Chica...

Peregrine falcon eggs from 1899 (Falco peregrinus anatum). Field Museum of Natural History, Chicago. FMNH catalogue no.6844. The Peregrine falcon was brought nearly to extinction in the mid 1960s, pri...

Cinnamon Screech-Owl (Megascops petersoni). Field Museum of Natural History, Chicago. FMNH catalogue no. 317314. Lack of knowledge of this species has lead to a risk classification nohigher than 'leas...

Florida perforate reindeer lichen (Cladonia perforata), FMNH. Conservation status: endangered. Field Museum of Natural History, Chicago.

A drawer of extinct species in the birds collection of the Field Museum of Natural History, Chicago, IL, USA. Field Museum of Natural History, Chicago.

Patagonian Cypress (Fitzroya cupressoides), FMNH 1294957. Conservation status: endangered. Field Museum of Natural History, Chicago.

Pau Brasil (Caesalpinia echinata), FMNH 1073460. Conservation status: endangered. Field Museum of Natural History, Chicago.