Castoroides ohioenis

The Giant Beaver

By Nicole Doucette T3

About Beverly, a Giant Beaver

My dear friend Beverly who was part of the Castoroides (cast-er-roid-dees) ohioensis (Ohio-en-sis) family, was one of the largest rodent to ever walk across North America. Beverly is well known as the “Giant Beaver”. Beverly went extinct about 11 thousand years ago and she was around for about 1.39 million years. This was during the Ice Age or Pleistocene Era. Her extinction is unknown, but scientist have two theories. The first is, her family couldn’t adapt to the cold climate in the Ice Age so they all died. The other theory is, some food sources went extinct and it affected the food chain. Beverly and her species had no food sources left so they couldn’t adapt to eating something else. But this was highly unlikely because Giant Beavers, like Beverly ate tall grass grown by the open water where they lived, not meat. But, the grass could have died out because of the cold weather. Then Beverly went extinct.

Their Daily Lives

Beverly roamed across swamps of North America where many trees, bushes, and open water was. Like her descendants today, the she had to live near water because of her predators, which lived on land. Her specie's predators were ancestors of crocodiles, leopards, tigers, and coyotes. They were also a prey of sabre-toothed tigers. Beverly's swimming skills were very good so it allowed her to escape from her predators fast. Giant Beavers, like beverly adapted a large body from having to build up muscle to fight their other prey. It was hard to run fast with so much weight so Beverly took up swimming as her second option. It was good for her because the tall wet grass was found right in her neighborhood, so she didn’t have to travel far for their food.

What They Look Like and Where You Can Find Them

Castoroides, like Beverly, were approximately eight feet long and up to 200 pounds. They had long skinnier tails that were about two feet long.She was one of the largest rodents to walk the Earth. She was a threat to most animals, even though most of the Giant Beavers, like Beverly only ate plants and were herbivores. The Beverly had huge six inch teeth that could easily cut through a tree or plant. Beverly is a warm blooded animal, who had great night vision because that was one of the only times that she could walk on land because their predators could attack them in the day. Although her species is extinct, her descendants, beavers are with us today right in our backyard of Boxborough and Acton. They roam all over the USA and Eurasia. We are so sad that Beverly is not with us today but we have Beavers in Memory of her, all around us.

Video on Castoroides

Catoroides Fossil

Giant Beaver Fossil


Works Cited

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