Ten of the most amazing Beaver facts

Reading and enjoying these ten of the most amazing Beaver facts

Although they didn’t have the characteristic flat tail, giant beavers of the Ice Age, known as “Castoroides,” looked remarkably similar to their modern descendants—just much, much bigger. They grew to be up to 8 feet long and 200 pounds and lived a semi-aquatic life.

2. THEY SECRETE A GOO THAT SMELLS LIKE VANILLA

In fact, it’s sometimes used in vanilla flavorings. Castoreum is a chemical compound that mostly comes from a beaver’s castor sacs, which are located under the tail. It is secreted as a brown slime that's about the consistency of molasses and smells like musky vanilla. It’s an FDA-approved natural flavoring.

3. THEIR DAMS CAN BE ENORMOUS

The world’s largest beaver dam stretches 850 meters deep in the thick wilderness of northern Alberta. It was discovered after being spotted on a satellite image in 2007, but scientists believe multiple generations of beavers have been working on the dam since the 1970s. Last September, explorer Rob Mark became the first person to ever reach the dam. Did you enjoy these animal facts?

4. BEAVERS ARE ROMANTICS AT HEART

Or at least they're monogamous. Dams are usually started by a young male looking for love or by a mated-for-life new couple. A whole beaver family will live in a single dam—mom, dad, young kids, and yearlings.

5. THEY ONCE TRAVELED BY PARACHUTE

In 1948, new human inhabitants of western Idaho began to clash with the local beaver population. The Idaho Department of Fish and Game wanted to put these threatened beavers in a nearby protected area, but they didn't know how to get them there. Elmo Heter of Idaho Fish and Game devised an ingenious solution: By using surplus parachutes from World War II, the department could drop boxes of beavers down from planes. After some careful calibrations, 76 beavers made the skydive into the basin, and all but one survived the fall. Do you want to check out our long and rich source of tigers facts in your spare time?

6. BEAVERS DO NOT BITE OFF THEIR OWN TESTICLES

This one may sound obvious, but up until the 1100s, people thought that beavers did. The myth originated in ancient Egypt and reappeared in the bestiaries of medieval Europe. The story went that beavers knew hunters were after them for the valuable castoreum oil in their testicles. This myth was not terribly difficult to disprove, largely because beaver testicles do not hang outside their bodies.

7. BEAVERS' FRONT TEETH ARE ORANGE

And not just because they have terrible dental hygiene. To gnaw through tree trunks, they need extra-strong teeth. Fortunately, their tooth enamel contains iron, which makes them incredibly strong, sharp, and orange. Because the orange enamel on the front of their teeth wears away more slowly than the white dentin on the back, a beaver’s teeth self-sharpen as he chews on trees.

8. DAMS HELP THEM AVOID ICE

Beavers build dams for a myriad of reasons, and one is so that the lake behind it will grow deep enough to ensure it doesn’t freeze all the way through during the winter. This bit of temperature control is especially crucial because beavers anchor a food cache to the bottom of the lake to serve as sustenance during the cold months.

9. THEY HAVE MULTI-PURPOSE TAILS

A beaver’s oversized leathery tail, which can grow up to 15 inches long and six inches wide, has uses both on land and in the water. While swimming, the beaver uses his tail as a rudder or as a siren by slapping it against the water to warn other beavers of a predator. On dry land, the tail acts a prop to allow the beaver to sit upright or as a counterbalance so he doesn’t tip over while carrying heavy supplies in his teeth.

10. ENGLAND'S BEAVERS ARE BACK?

Until recently, the last mention of a beaver sighting in England came in 1789 when a bounty was paid for a beaver head in Yorkshire. By that point, the once prolific beaver had dwindled due to over-hunting for their valuable pelts and medicinal glands. For several hundred years, the species disappeared from Great Britain, and it was assumed they’d gone extinct. Last year, a retired environmental scientist documented a family of beavers living near his home, but now the rodents are causing a controversy. Although beavers are also making a comeback on the continent—after numbers dwindled to just 1,200 the population is now estimated around 300,000—British officials are concerned the ecosystem has changed too much to accommodate them.

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