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What are the Best Known Extinct Species?

Cassie L. Damewood
Cassie L. Damewood

Although there are thousands of extinct species in the world, some are much better known than others. This popularity is sometimes based on the animal’s memorable appearance or significance in the evolutionary process. Another common reason for the popularity of some extinct animals is the repeated reference made to them in books, movies, television and natural history museums. Well-known extinct species include various kinds of dinosaurs, birds and exotic mammals.

Even though it became extinct about 65 million years ago, Tyrannosaurus Rex is probably the most renowned extinct species of all. The dinosaur weighed up to seven tons (approximately 6,350 kg) and was normally more than 43 feet (13 meters) long. This creature is considered to be the largest carnivore that ever walked the earth.

Though commonly thought of as extinct, contemporary researchers believe that dinosaurs evolved into birds.
Though commonly thought of as extinct, contemporary researchers believe that dinosaurs evolved into birds.

Extinct since 1844, the Great Auk is one of two well-known flightless birds on the list. This species was the only penguin that hailed from the Atlantic region, and fossils indicate it traveled as far south as the state of Florida in the United States. Overhunting resulted in the extinction of the Great Auk, also commonly referred to as a garefowl.

The other flightless bird on the most popular extinct species list is the Dodo. This bird, a relative of doves and pigeons, disappeared in the 17th century. It made its home on the island of Mauritius and subsisted on a strictly fruit-based diet.

Dinosaurs are among the best known extinct species.
Dinosaurs are among the best known extinct species.

Famous for being the largest deer in history, the Irish Deer, also called Giant Deer, was also celebrated for having the largest antlers of any deer. The sprawling branched horn on the animal was often 12 feet (approximately 3.65 meters) across and could weigh in at a whopping 90 pounds (40.8 kg). History sometimes attributes this beast’s extinction 7,700 years ago to its antlers keeping it from averting predators, but the popular theory is that man hunted it into oblivion.

The now-extinct Caspian tiger resembled the Bengal tiger.
The now-extinct Caspian tiger resembled the Bengal tiger.

Two tigers are among the best known extinct species. The Tasmanian Tiger, which was last seen in 1936, holds the title of modern times’ largest carnivorous marsupial. The cat was native to Australia and New Guinea. More recently, around 1970, the Caspian Tiger became extinct. It was the third largest species of tiger in the world, and its appearance closely resembled the Bengal tiger often featured in today’s zoos.

The Dodo is a well-known extinct bird.
The Dodo is a well-known extinct bird.

Another member of the cat family, the Cave Lion, was one of the largest lions in history. Some historians claim this species ceased to exist more than 10,000 years ago and others maintain the Cave Lion disappeared only 2,000 years ago. A relative of the Cave Lion was reportedly found in 1985 in Germany.

Stellar’s Sea Cow, often referred to as the defenseless beast, resembled a very large seal. It grew up to 25.9 feet (7.9 meters) in length and could weigh up to 6,000 pounds (about 2,721 kg). It had a short history as it was discovered in 1741 and became an extinct species in 1768. Another cow on the extinct species list is the Auroch. The Auroch is generally thought to be one of Europe’s most notorious extinct animals. Despite laws demanding that any hunter of Aurochs be put to death to protect the species, the last one died in 1527 in a Polish forest.

Generally considered one of Africa’s most notable extinct animals, the Quagga may have one of the most interesting appearances of all on this list. Its markings clearly indicate that the animal was a crossbreed of a zebra and a horse, with stripes appearing on only half its body. The last Quagga reportedly passed away in an Amsterdam zoo in 1883.

Frequently Asked Questions

What is the most iconic extinct species?

The Dodo bird, native to Mauritius, is often the poster child for extinction. It became extinct in the late 17th century due to human activities and introduced species. Its inability to fly and lack of fear towards humans made it particularly vulnerable, turning it into a symbol for irreversible loss in biodiversity.

Which extinct species was the largest to ever walk the earth?

The Argentinosaurus is one of the largest known dinosaurs, and by extension, one of the largest extinct species. According to paleontological estimates, it could have measured up to 100 feet in length and weighed up to 100 tons, showcasing the incredible scale of some prehistoric life forms that once roamed our planet.

Are there any extinct species that went extinct recently?

The Pinta Island tortoise, with the last known individual "Lonesome George" passing in 2012, is a recent example of extinction. This species' decline was accelerated by human exploitation and introduced predators. George's death marked the end of his species and highlighted the ongoing impact humans have on biodiversity.

What caused the extinction of the Passenger Pigeon?

The Passenger Pigeon, once numbering in the billions in North America, was driven to extinction by the early 20th century due to overhunting and habitat destruction. Their massive flocks were seen as an inexhaustible resource, but relentless exploitation led to their demise, illustrating the destructive power of unchecked human activity.

How did the Tasmanian Tiger become extinct?

The Tasmanian Tiger, or Thylacine, was a carnivorous marsupial native to Australia, Tasmania, and New Guinea. It became extinct in the 20th century, primarily due to hunting, encouraged by bounties, habitat loss, disease, and competition with dogs and humans. The last known individual died in captivity in 1936.

What are scientists doing to learn about extinct species?

Scientists use a variety of methods to study extinct species, including paleontology, genetics, and computational modeling. For instance, DNA analysis allows researchers to understand the genetic makeup of extinct creatures, while fossil records provide insights into their physical characteristics and the environments they lived in. These studies help reconstruct past ecosystems and inform conservation efforts for current endangered species.

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    • Though commonly thought of as extinct, contemporary researchers believe that dinosaurs evolved into birds.
      By: Bastos
      Though commonly thought of as extinct, contemporary researchers believe that dinosaurs evolved into birds.
    • Dinosaurs are among the best known extinct species.
      By: markrhiggins
      Dinosaurs are among the best known extinct species.
    • The now-extinct Caspian tiger resembled the Bengal tiger.
      By: StarJumper
      The now-extinct Caspian tiger resembled the Bengal tiger.
    • The Dodo is a well-known extinct bird.
      By: Tesgro Tessieri
      The Dodo is a well-known extinct bird.