Animals
Extinct Animals Ranked
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Updated:3/21/2026
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Animal↕ | Went Extinct↕ | Cause of Extinction↕ | Location↕ | Known For↕ |
|---|---|---|---|---|
Tyrannosaurus Rex | 66 million years ago | Asteroid impact (Chicxulub) | North America | The king of dinosaurs — 12 meters long with a bite force of 12,800 pounds (strongest of any land animal ever), tiny arms are the internet's favorite joke but they could curl 200 kg each, likely had feathers as a juvenile, Sue at the Field Museum is the most complete T. rex skeleton, Jurassic Park made it the most famous extinct animal, the predator that every child draws first |
Woolly Mammoth | ~4,000 years ago | Climate change + human hunting | Northern Hemisphere (Arctic) | The ice age icon that Colossal is trying to resurrect — last population survived on Wrangel Island until 2000 BC (the pyramids were already built), preserved frozen specimens retain DNA, tusks up to 4 meters long, cave paintings show them alongside humans, Colossal Biosciences is attempting de-extinction using Asian elephant DNA, the most likely extinct animal to be brought back, the elephant in a fur coat |
Dodo | ~1681 | Human hunting, introduced species | Mauritius (Indian Ocean) | The poster child for extinction — flightless, fearless of humans (never encountered predators), went extinct within 80 years of human arrival, 'dead as a dodo' entered the language, only a few bones and sketches survive (no complete specimen), Dutch sailors ate them and their introduced rats ate the eggs, the most famous example of human-caused extinction, Alice in Wonderland featured it |
Megalodon | 3.6 million years ago | Climate cooling, prey decline, great white competition | Worldwide oceans | The largest shark ever — 15-18 meters long (3x a great white), teeth up to 18 cm found on beaches worldwide, could bite with 40,000 lbs of force, the Meg movies brought it back to pop culture, conspiracy theorists insist it still exists in the deep ocean (it doesn't), the ocean predator that makes great whites look like guppies, the extinct animal most likely to give you nightmares |
Passenger Pigeon | 1914 (Martha, last individual) | Industrial-scale hunting, habitat loss | North America | The most abundant bird in history reduced to zero — flocks of 3-5 billion darkened skies for hours (25-40% of all North American birds), hunted commercially by the trainload, Martha the last passenger pigeon died at the Cincinnati Zoo on September 1, 1914, went from billions to zero in 50 years, the most shocking extinction in terms of scale, the bird that proved even the most abundant species can be destroyed |
Saber-Toothed Cat (Smilodon) | ~10,000 years ago | Megafauna extinction, human arrival | Americas | The fanged predator of the ice age — 28 cm canine teeth were used for precision kills on the throat (not stabbing), La Brea Tar Pits preserve thousands of Smilodon specimens, muscular build was more like a bear than a modern cat, likely ambush-hunted megafauna, Diego from Ice Age is a Smilodon, one of the most commonly found large predator fossils, the cat that proves modern big cats are small compared to their ancestors |
Thylacine (Tasmanian Tiger) | 1936 (Benjamin, last individual) | Hunting by farmers, habitat loss, disease | Tasmania, Australia | The marsupial that looked like a dog — striped back gave it the 'tiger' name, actually a marsupial (carried young in a pouch), the last one died in Hobart Zoo in 1936, haunting black-and-white film footage of Benjamin survives, reported sightings continue to this day (none confirmed), Colossal Biosciences is also working on thylacine de-extinction, the most recent large predator extinction that we have video of |
Steller's Sea Cow | 1768 (27 years after discovery) | Hunting by fur traders | Commander Islands (North Pacific) | Discovered and destroyed in one human generation — Georg Steller described it in 1741, hunters killed the last one by 1768, 8-9 meters long (larger than a manatee), completely docile and did not flee from boats, the shortest time from scientific discovery to extinction of any large animal, the most tragic extinction timeline in history, proof that humans can erase a species faster than we can study it |
Irish Elk (Megaloceros) | ~7,700 years ago | Habitat change, human hunting | Europe, Northern Asia | The largest antlers of any animal ever — antlers spanned 3.7 meters (12 feet) and weighed 40 kg, not actually Irish or an elk (widespread European deer), the antlers may have been a sexual selection runaway (too large for practical use), spectacular fossils found in Irish peat bogs, the animal that proves evolution can optimize for attracting mates to the point of impracticality, the most dramatic headgear in animal history |
Quagga | 1883 | Hunting, habitat loss | South Africa | The half-zebra that faded away — front half was striped like a zebra, back half was plain brown like a horse, the last one died in Amsterdam Zoo in 1883, only one was ever photographed alive, the Quagga Project is selectively breeding plains zebras to recreate the quagga phenotype (not true de-extinction), DNA analysis showed it was a subspecies of the plains zebra, the most visually unique equine that ever lived |
Dunkleosteus | 359 million years ago | Late Devonian extinction event | Worldwide oceans | The armored fish that ruled the seas before sharks — 6-10 meters of armored predator with a bite force rivaling T. rex, instead of teeth it had bony plates that self-sharpened, the apex predator of the Devonian period, one of the first superpredators in Earth's history, the skull alone is terrifying in museum displays, the ancient fish that makes you grateful for modern oceans, the original sea monster before sharks evolved |
Carolina Parakeet | 1918 | Hunting, habitat loss, disease from poultry | Eastern USA | The only parrot native to the eastern United States — bright green and yellow plumage seemed impossible for North America, killed as agricultural pests and for their feathers (hat fashion), the last one (Incas) died at the Cincinnati Zoo in 1918 — the same zoo where Martha the last passenger pigeon died 4 years earlier, the eastern US lost its only parrot and barely noticed, the colorful bird America forgot it had |
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