Prehistoric Animals | List of Prehistoric Animals with Useful Facts

What are prehistoric animals? For millions of years animals have walked the earth, long before humans ever existed. They are part of the history of the earth and there were many, many different species that roamed the land, the skies, and the sea.

Prehistoric Animals

What are Prehistoric Animals?

Prehistoric animals are animals that lived more than 5,000 years ago and go right the way back many millions of years. Although you would automatically think of prehistoric animals as being “dinosaurs” that is not strictly true as dinosaurs are actually a group of reptiles that were usually large and had hind legs that extended directly underneath their bodies. However, prehistoric animals lived during three main periods in history.

They lived during the Paleozoic, Mesozoic, and Cenozoic periods. Up until the beginning of the Paleozoic period, most animals had lived in the seas. However, during this period (600 million to 240 million years ago), animals developed that were able to live on land. These included reptiles, amphibians, and insects.

The Mesozoic era (240 million to 65 million years ago) is known for being predominantly reptiles and was when the dinosaurs roamed the earth. The dinosaurs died out and the end of this period and it is believed that a large asteroid hit Earth and caused a massive climate change that wiped them out.

The Cenozoic era (65 million years ago to current) saw the development of mammals.

There are still relatives of prehistoric animals living today and the closest animals to prehistoric creatures are crocodiles and alligators, along with some types of shark.

List of Prehistoric Animals

There are a vast number of prehistoric animals that have roamed the earth over millions of years, but some of them are:

  • Mammoths
  • Sabre-tooth cat
  • Mastodon
  • Megalodon
  • Paraceratherium
  • Phorusrhacos Longissimus (Terror Bird)
  • Procoptoden
  • Titanoboa
  • Uintatherium
  • Andrewsarchus
  • Arthropleura
  • Camarasaurus
  • Camelops
  • Ceratosaurus
  • Doedicurus
  • Brontotherium
  • Daeodon
  • Arsinoitherium
  • Megalocerus
  • Pterodactyl
  • Spinosaurus
  • Velociraptor
  • Mosasaurus

Prehistoric Animals with Facts

  • The tusks of a mammoth could grow to around 16 feet long.
  • The largest mammoths stood at around 14 feet high at the shoulder and weighed up to 10 tonnes.
  • The canine teeth of a sabre-toothed cat grew to around 8 inches long.
  • The megalodon is thought to have been the largest fish ever and had a mouth approximately 10 feet wide.
  • Terror birds stood around 8 feet tall and couldn’t fly. They had sharp claws and a hooked beak for tearing into prey.
  • The titanoboa, at around 50 feet long was the largest snake to have ever lived and is thought to be a relative of both the anaconda and the boa constrictor.
  • Arthropleura were giant millipedes and although the adults were herbivores, it is thought that young ones were carnivores as they didn’t develop the ability to digest plants until they became adults.
  • Prehistoric kangaroos could not hop as they were too big; instead they ran on two legs.
  • Mesonychids were carnivorous animals that resembled wolves and hyenas but had hooves instead of feet.
  • The ambulocetus is an ancestor of whales that had webbed feet and a long snout, but swam like a whale and came onto land.
  • It was originally thought that the basilosaurus was a reptile, but it was actually a prehistoric whale that had a long, slim body like an eel, but much bigger.

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Last Updated on February 17, 2023

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