SINCLAIR STAMMERS / Well preserved fossil of trilobite Dudley locust (Calymene blumenbachii) from the Silurian period, found in the Wenlock Limestone of Wrens Nest Hill, Dudley, Worcestershire.

Mark Carwardine / Yangtze / Chinese river dolphin / Baiji {Lipotes vexillifer} Critically endangered - officially declared extinct late 2007. This individual (a male called Qi-Qi) was photographed in captivity in 1988...

Paul D Stewart / Male Large Blue Butterfly (Maculinea eutryphon / arion) collected in 1865. It is here surrounded by other extant UK blue butterfly species. The large Blue was first recorded as a British species in 17...

Paul D Stewart / 'Martha' the last passenger pigeon, (Ectopistes migratorius), who died Cincinnati Zoo, September 1st, 1914. This portrait of her published in March 1915 as the Frontispiece to William Hornaday's 'The...

Paul D Stewart / A rare British broadsheet illustration with contemporary hand colouring, drawn and engraved by John Emslie and published by James Reynolds in 1849. It shows reconstructions of extinct creatures in the...

Paul D Stewart / Skull of Moa or Dinornis discovered by Mr. Walter Mantell on the North Island of New Zealand. Plate with later tinting, from Gideom Mantell's petrifactions and their teachings (1851) published by Henr...

Paul D Stewart / Great Auk (Pinguinus impennis) from the Rev. Francis Orpen Morris' 'A History of British Birds' by the printer Benjamin Fawcett circa 1853. Morris was instrumental in founding the Royal Society for th...

Peter Cairns / 2020VISION / Exmoor Ponies (Equus caballus) grazing at Seven Sisters Country Park, South Downs, England, November. Did you know? Some people believe that Exmoor ponies are related to the now extinct Tarpan horse o...

Juan Carlos Munoz / Fossil of extinct perch fish (Priscacara sp) from the Eocene period, Wyoming, USA

Roland Seitre / Scimitar Oryx (Oryx dammah) at the breeding program at Reserve du Ferlo Nord, near Ranero in Senegal. Captive. Previously common, over-hunting and habitat destruction through the 20th century has left...

Roland Seitre / Scimitar Oryx (Oryx dammah) at the breeding program at Reserve du Ferlo Nord, near Ranero in Senegal. Captive. Previously common, over-hunting and habitat destruction through the 20th century has left...

Roland Seitre / Black-footed Ferret (Mustela nigripes) seen in its burrow. The species is endangered on account of prey depletion and vulnerability to foreign infection. Declared extinct in the wild in 1987, a succes...

Roland Seitre / Black-footed Ferret (Mustela nigripes). The species is endangered on account of prey depletion and vulnerability to foreign infection. Declared extinct in the wild in 1987, a successful breeding progr...

Ross Hoddinott / 2020VISION / Group of Exmoor ponies {Equus caballus}, released at Street Heath (Somerset Wildlife Trust) Nature Reserve, for conservation grazing, Somerset Levels, Somerset, UK. June 2011. Did you know? These poni...

David Tipling / 2020VISION / Exmoor Pony (Equus caballus) grazing, the ponies are used to manage grassland on the Sandlings heath, Suffolk, UK, February 2011. Photographer quote: 'These Exmoor ponies are used to replicate the gra...

Terry Whittaker / 2020VISION / Konik horse (Equus caballus) two stallions fighting, wild herd in rewilding project, Wicken Fen, Cambridgeshire, UK, June 2011. Photographer quote: "Koniks are a rare Polish horse used as surrogate gr...

Daniel Heuclin / Theropod dinosaur tracks preserved in Lower Jurassic (200 million years old) rock. Near Tuba City, Arizona, USA

Martin Camm / Carwardine / Illustration of Dodo (Raphus cucullatus), Columbidae, endemic to Mauritius. Extinct since the mid to late 17th century (Wildlife Art Company).

John Cancalosi / Fossil Keichousaurus (Keichousaurus hui, family Pachypluerosauridae), a lizard-like marine reptile from the Triassic Period. China

Mark Carwardine / Northern white rhinoceros (Ceratotherium simum cottoni) with horn removed, after initial release into the wild, Ol Pejeta Conservancy, Kenya, June 2010, Extinct in the wild, only eight left in captivi...

Mark Carwardine / Northern white rhinoceros (Ceratotherium simum cottoni) close-up of eye, Dvur Kralove Zoo, Czech Republic, December 2009, Extinct in the wild, only eight left in captivity, critically endangered, Part...

Mark Carwardine / Northern white rhinoceros (Ceratotherium simum cottoni) close up of eye, in enclosure at Dvur Kralove Zoo, Czech Republic, the day before departure, December 2009, Extinct in the wild, only eight left...

Miles Barton / Panamanian Golden Frog (Atelopus ziteki) Panama, Featured in BBC NHU series 'Life in Cold Blood'. Species now extinct in the wild

Miles Barton / Panamanian golden frog (Atelopus ziteki) reacting to the image of a frog on a video monitor. Experiment carried out to reveal the purpose of the frog's waving behaviour - to attract mates and deter ri...

Stephen Dalton / Green mosaic / Rancho grande harlequin frog (Atelopus cruciger) walking along tree trunk, Henri Pittier NP, Venezuela, South America, Critically endangered, thought extinct until a gravid female was f...

Mark Bowler,Mark Bowler / Dodo {Raphus cucullatus} reconstruction. Extinct.

John Cancalosi / Stuffed specimen of Ivory billed woodpecker {Campephilus principalis} USA Louisiana - believed extinct until sighting in 2005

Nigel Marven / Volcanic cone, Badkhyz, Uzbekistan, Russia

John Cancalosi / Fossil Mammoth tooth {Mammuthus meridinalis} Pleistocene S Carolina USA

Doug Allan / Laguna Verde and extinct volcano Licancabur on the altiplano of Bolivia at 4500m

David Tipling / Large blue butterfly (Phengaris arion), female. Re-introduction programme. Somerset, England, UK, Europe

Yva Momatiuk & John Eastcott / California Condor (Gymnogyps californianus) immature bird flying with transmitter attached, critically endangered extinct in wild and recently re-introduced, 9-10 foot wingspan, Marble Canyon, Arizona

Michael & Patricia Fogden / Golden Toad (Bufo periglenes) male, breeding aggregation, extinct, Monteverde Cloud Forest Reserve, Costa Rica

Tui De Roy / Pinta Island Galapagos Tortoise (Chelonoidis nigra abingdoni), Lonesome George, the last survivor of his race, Darwin Reserve Station, Santa Cruz Island, Galapagos Islands, Ecuador

Doug Allan / Laguan Verde, Andes, Bolivia. Extinct Inca volcano behind. 4300m.

Steven David Miller / Blue Lake in extinct volcano crater, Mt Gambier. Supplies 36K million litres water to town below. South Australia

Bristol City Museum / Great auk specimen - seabird hunted to extinction mid 19th century {Pinguinnus impennis}

Bristol City Museum / Dodo model {Raphus cucullatus} - flightless bird native to Mauritius, hunted to extinction.

Rod Williams / Moorean viviparous tree snail {Partula suturalis} extinct in Moorea

Gavin Hellier / View from the rim into the crater of Ranu Kau, Isla de Pascua / Easter Island, Rapa Nui, Chile, 2008

Gavin Hellier / View from the rim into the crater of Ranu Kau, Isla de Pascua / Easter Island, Chile 2008

Peter Cairns / 2020VISION / Osprey (Pandion haliaetus) taking off from the surface fo a lake with fish prey, Cairngorms National Park, Scotland, UK, July. Did you know? Ospreys became extinct in the UK in the early 20th Century;...

Juan Manuel Borrero / Illustration of Acanthodii or Spiny sharks, an extinct class of fish which shared features of both cartilaginous and bony fish. Pencil and watercolor painting.

SINCLAIR STAMMERS / Underside or ventral surface of a trilobite (Acaste downingae) showing the biramous limb attachment points, from Silurian period, Wenlock limestone, Dudley.

SINCLAIR STAMMERS / Grapolite (Didymograptus murchisoni) from Ordovician, Upper Llanvirn shales. Found at the southern end of Abereiddy Bay, Pembrokeshire, Wales

SINCLAIR STAMMERS / Marrella splendens (Walcott) left and Burgessia bella (Walcott) right from the Burgess shale, British Columbia. At 505 million years old -Middle Cambrian- Burgess Shale fossils are preserved as a fil...

SINCLAIR STAMMERS / Well preserved fossil of trilobite Dudley locust (Calymene blumenbachii) from the Silurian period, found in the Wenlock Limestone of Wrens Nest Hill, Dudley.

SINCLAIR STAMMERS / Trilobite (Flexicalymene meeki) rolled showing defensive behaviour, from the Ordovician period, found in the Richmond Formation, USA

SINCLAIR STAMMERS / Well preserved fossil of trilobite Dudley locust (Calymene blumenbachii) from silurian period, found in the Wenlock Limestone of Wrens Nest Hill, Dudley.

SINCLAIR STAMMERS / Well preserved fossil of trilobite, Dudley locust (Calymene blumenbachii) rolled in defensive position, from Silurian period, found in the Wenlock Limestone of Wrens Nest Hill, Dudley.

SINCLAIR STAMMERS / Well preserved fossil of trilobite, Dudley locust (Calymene blumenbachii) rolled in defensive position, from Silurian period, found in the Wenlock Limestone of Wrens Nest Hill, Dudley.

SINCLAIR STAMMERS / Well preserved fossil of trilobite Dudley locust (Calymene blumenbachii) from the Silurian period, found in the Wenlock Limestone of Wrens Nest Hill, Dudley.

Mark Carwardine / Cook Strait giant weta {Deinacrida rugosa} Extinct in the wild until 2007, now captive-bred animals are being re-released, blue tag is marker for research purposes, Matiu-Somes Island, Wellington Harb...

Mark Carwardine / Cook Strait giant weta {Deinacrida rugosa} Extinct in the wild until 2007, now captive-bred animals are being re-released, blue tag is marker for research purposes, Matiu-Somes Island, Wellington Harb...

Mark Carwardine / Cook Strait giant weta {Deinacrida rugosa} Extinct in the wild until 2007, now captive-bred animals are being re-released, blue tag is marker for research purposes, Matiu-Somes Island, Wellington Harb...

Mark Carwardine / Cook Strait giant weta {Deinacrida rugosa} Extinct in the wild until 2007, now captive-bred animals are being re-released, blue tag is marker for research purposes, Matiu-Somes Island, Wellington Harb...

Mark Carwardine / Cook Strait giant weta {Deinacrida rugosa} Extinct in the wild until 2007, now captive-bred animals are being re-released, blue tag is marker for research purposes, Matiu-Somes Island, Wellington Harb...

Mark Carwardine / Mexican wolf (Canis lupus baileyi) extinct in the wild in Mexico but survives in captivity, Captive, Living Desert Zoo, Palm Desert, California, USA

Mark Carwardine / Yangtze / Chinese river dolphin / Baiji {Lipotes vexillifer} Critically endangered - officially declared extinct late 2007. This individual (a male called Qi-Qi) was photographed in captivity in 1988...

Mark Carwardine / Yangtze / Chinese river dolphin / Baji {Lipotes vexillifer} Critically endangered - officially declared extinct late 2007. This individual (a male called Qi-Qi) was photographed in captivity in 1988 a...

Mark Carwardine / New Caledonia crested / Guichenot's giant / Eyelash gecko (Rhacodactylus ciliatus) captive, from South Province, New Caledonia. Thought to be extinct but rediscovered in 1994

Mark Carwardine / New Caledonia crested / Guichenot's giant / Eyelash gecko (Rhacodactylus ciliatus) using tongue to wipe its eye clean, captive, from South Province, New Caledonia. Thought to be extinct but rediscover...

Mark Carwardine / New Caledonia crested / Guichenot's giant / Eyelash gecko (Rhacodactylus ciliatus) captive, from South Province, New Caledonia. Thought to be extinct but rediscovered in 1994

Mark Carwardine / Comparison of teeth of Great white shark and extinct Megalodon, Malta

Tui De Roy / Giant tortoise (Chelonoidis nigra) surgery at the Tortoise Breeding Centre, Galapagos

Tui De Roy / Men moving Galapagos giant Tortoise (Chelonoidis nigra) for surgery Tortoise Breeding Centre, Galapagos

Tui De Roy / Galapagos giant tortoise (Chelonoidis nigra) surgery, Tortoise Breeding Centre, Galapagos

Tui De Roy / Pinta Island tortoise (Chelonoidis nigra abingdoni) 'Lonesome George' the last Pinta Island tortoise, captive, which died June 2012, Pinta Island, Galapagos, July 2008

Tui De Roy / Pinta Island tortoise (Chelonoidis nigra abingdoni) 'Lonesome George' the last Pinta Island tortoise, captive, which died June 2012, Pinta Island, Galapagos, July 2008

Tui De Roy / Pinta Island tortoise (Chelonoidis nigra abingdoni) 'Lonesome George' the last Pinta Island tortoise, captive, which died June 2012, Pinta Island, Galapagos, July 2008

Tui De Roy / Pinta Island tortoise (Chelonoidis nigra abingdoni) 'Lonesome George' the last Pinta Island tortoise, captive, which died June 2012, Pinta Island, Galapagos, July 2008

Tui De Roy / Pinta Island tortoise (Chelonoidis nigra abingdoni) 'Lonesome George' the last Pinta Island tortoise, captive, which died June 2012, Pinta Island, Galapagos, July 2008

Juan Carlos Munoz / Fossil of extinct stingray (Ciclobatis major raya)

Juan Carlos Munoz / Fossil of Ammonite shells, from Phokara valley, Nepal

Juan Carlos Munoz / Fossil of the extinct echinoid (Archaeocidoris sp)

Roland Seitre / Desert Warthog (Phacochoerus aethiopicus delamerei), a sub-species of warthog thought extinct until rediscovery in the late 20th century, with zebra and woman walking by. Tsavo National Park, Kenya, J...

Roland Seitre / Desert Warthog (Phacochoerus aethiopicus delamerei), a sub-species of warthog thought extinct until rediscovery in the late 20th century, in water. Tsavo National Park, Kenya, January 2009.

Roland Seitre / Desert Warthog (Phacochoerus aethiopicus delamerei), a sub-species of warthog thought extinct until rediscovery in the late 20th century. Tsavo National Park, Kenya, January 2009.

Roland Seitre / Desert Warthog (Phacochoerus aethiopicus delamerei), a sub-species of warthog thought extinct until rediscovery in the late 20th century. Tsavo National Park, Kenya, January 2009.

Roland Seitre / Desert Warthog (Phacochoerus aethiopicus delamerei), a sub-species of warthog thought extinct until rediscovery in the late 20th century. Tsavo National Park, Kenya, January 2009.

Roland Seitre / Desert Warthog (Phacochoerus aethiopicus delamerei), a sub-species of warthog thought extinct until rediscovery in the late 20th century. Tsavo National Park, Kenya, January 2009.

Roland Seitre / Desert Warthog (Phacochoerus aethiopicus delamerei), a sub-species of warthog thought extinct until rediscovery in the late 20th century. Tsavo National Park, Kenya, January 2009.

Roland Seitre / Desert Warthog (Phacochoerus aethiopicus delamerei), a sub-species of warthog thought extinct until rediscovery in the late 20th century. Tsavo National Park, Kenya, January 2009.

Roland Seitre / Desert Warthog (Phacochoerus aethiopicus delamerei), a sub-species of warthog thought extinct until rediscovery in the late 20th century. Tsavo National Park, Kenya, January 2009.

Roland Seitre / Family of Desert Warthog (Phacochoerus aethiopicus delamerei), a sub-species of warthog thought extinct until rediscovery in the late 20th century. Tsavo National Park, Kenya, January 2009.

Roland Seitre / Desert Warthog (Phacochoerus aethiopicus delamerei), a sub-species of warthog thought extinct until rediscovery in the late 20th century. Tsavo National Park, Kenya, January 2009.

Roland Seitre / Desert Warthog (Phacochoerus aethiopicus delamerei), a sub-species of warthog thought extinct until rediscovery in the late 20th century. Tsavo National Park, Kenya, January 2009.

Roland Seitre / Desert Warthog (Phacochoerus aethiopicus delamerei), a sub-species of warthog thought extinct until rediscovery in the late 20th century. Tsavo National Park, Kenya, January 2009.

Roland Seitre / Desert Warthog (Phacochoerus aethiopicus delamerei), a sub-species of warthog thought extinct until rediscovery in the late 20th century. Tsavo National Park, Kenya, January 2009.

Nick Garbutt / Skull of giant extinct sloth lemur (Palaeopropithecus kelyus). Recovered from underground coastal cave systems near Anjajavy. Photographed on leaf-litter in dry deciduous forest near Anjavavy, north w...

Roland Seitre / Conservation officer carries out leg surgery on a Panamanian golden frog / Golden arrow poison frog (Atelopus zeteki) at the El Valle Amphibian Conservation Center, Panama, Central America, March 2008...

Roland Seitre / Conservation officer administers anti-parasite treatment to Panamanian golden frog / Golden arrow poison frog (Atelopus zeteki) at the El Valle Amphibian Conservation Center, Panama, Central America,...

Roland Seitre / Conservation officer administers anti-parasite treatment to Panamanian golden frog / Golden arrow poison frog (Atelopus zeteki) at the El Valle Amphibian Conservation Center, Panama, Central America,...

Roland Seitre / Conservation officer administers anti-parasite treatment to Panamanian golden frog / Golden arrow poison frog (Atelopus zeteki) at the El Valle Amphibian Conservation Center, Panama, Central America,...

Roland Seitre / Panamanian golden frog / Golden arrow poison frog (Atelopus zeteki) female with eggs, El Valle Amphibian Conservation Center, Panama, Central America, March 2008, Critically endangered species

Roland Seitre / Veterinary officer, Eric Baitchman, and Conservation officer, Heidi Griffith, examining female Panamanian golden frog / Golden arrow poison frog (Atelopus zeteki) at frog breeding station, El Valle Am...