Joel Sartore / Photo Ark / Collection of extinct Pheres blue butterflies (Icaricia icarioides pheres), McGuire Center for Lepidoptera and Biodiversity in Gainesville, Florida, USA.

Nick Garbutt / Two Elephant bird (Aepyornis sp.) skeletons on display, alongside replica of bird egg. The Elephant bird became extinct within the past 1000 years due to overhunting by humans, Madagascar.

Roland Seitre / Labrador duck (Camptorhynchus labradorius), wooden sculpture of male, Oak Hammock Marsh Interpretation Center, Winnepeg, Canada. Extinct.

Roland Seitre / Labrador duck (Camptorhynchus labradorius), wooden sculpture of male, Oak Hammock Marsh Interpretation Center, Winnepeg, Canada. Extinct.

Roland Seitre / Quagga (Equus quagga quagga), an extinct subspecies of the plains zebra, endemic to South Africa, striped skin detail, Natural History Museum, Paris, France. EDITORIAL USE ONLY.

Nick Garbutt / Egg size comparison to scale: extinct Elephant bird (Aepyornis maximus) - shell reconstructed from fragments found in dry river beds in southern Madagascar -, Common ostrich (Struthio camelus) and D...

Ernie Janes / Sumatran tiger (Panthera tigris sondaica) snarling, portrait. Captive.

Ernie Janes / RF - Sumatran tiger (Panthera tigris sondaica) snarling, portrait. Captive. (This image may be licensed either as rights managed or royalty free.)

Bruce Thomson / Bramble cay melomys (Melomys rubicola), a small rodent that was endemic to a small coral cay in the Torres Strait. A few years ago, the sea level rose enough to flood the cay at high tide and so this...

Tui De Roy / Pinta giant tortoise (Chelonoidis abingdoni) hybrid cross with Wolf giant tortoise (Chelonoidis becki). Found in January 2020, and around 15 years old, she will become the nucleus of a new captive bre...

Will Watson / Woolly Mammoth (Mammuthus primigenius) molar tooth from a young Mammoth, originating from the North Sea. Focus stacked.