What's Unusual about a Beaver When It Goes Underwater?

A beaver is a type of large rodent that lives in rivers, wetlands and marshes. Beavers are known for changing their habitat by constructing homes and dams. Beavers can swim long distances, staying under water for considerable amounts of time without a break. Some say that beavers can remain under water for four minutes, while others estimate that they can remain under water for up to 15 minutes. Beavers are very active under water thanks to their transparent eyelids, as well as nose and ear valves, that automatically close underwater.

A beaver under water is sort of like a swimmer wearing goggles and ear plugs. Along with their naturally waterproof fur, beavers have all of the qualities needed for a successful life in water. Experts believe beavers are essential for the health and balance of wetlands in the world. Although human residents of areas with large beaver populations may be troubled by the occasional flooding caused by beavers' dams, environmentalists say the same dams help clean polluted water. It is one more reason to like our furry friends.

More about beavers:

• Beavers are the most common rodents in North America.
• Beavers make their homes out of mud and wood in water, with an underwater entrance for safety.
• Beavers weigh about 60 pounds (27 kilograms) and eat water plants, roots and twigs.

Frequently Asked Questions

How long can beavers stay underwater?

Beavers are remarkable swimmers and can stay submerged for up to 15 minutes. This is due to their large lungs and a specialized heart rate that slows down underwater, conserving oxygen. Their ability to hold their breath for such durations allows them to forage, build, and repair their underwater structures with ease.

What adaptations do beavers have for underwater activities?

Beavers have several unique adaptations for an aquatic lifestyle. They possess transparent eyelids that function like goggles, allowing clear vision underwater. Their fur is naturally oily and waterproof, keeping them insulated against cold water. Additionally, their large webbed hind feet act like paddles, making them strong and efficient swimmers.

Do beavers have a way to prevent water from entering their ears and nose underwater?

Yes, beavers have built-in mechanisms to prevent water from entering their ears and nose while submerged. They can close their nostrils and ears when they dive. This adaptation is crucial for an animal that spends significant time underwater, as it protects their sensitive ear and nasal passages from water intrusion.

What role do beaver's teeth play when they are underwater?

Beaver's teeth are essential for their underwater activities. Their incisors, which are coated with iron-enriched enamel, can cut through wood even underwater. This allows beavers to gnaw on branches and trees for building dams and lodges without the need to surface frequently. The iron makes their teeth stronger and more resistant to decay.

How do beavers communicate or detect danger underwater?

Beavers use a combination of vocalizations and tail slaps on the water surface to communicate, especially to signal danger. Underwater, they rely on their keen sense of touch and vibrations to detect changes in their environment. Their whiskers are highly sensitive and help them navigate and sense potential threats while submerged.

Can beavers breathe underwater?

No, beavers cannot breathe underwater; they are mammals and require air to breathe. However, they have adapted to their aquatic habitat by being able to hold their breath for extended periods. This adaptation is crucial for their survival, as it allows them to forage and construct their habitats while avoiding predators.