10 Facts About Squirrels

Squirrels, the playful, bushy-tailed creatures we often see frolicking in our parks and backyards, are surprisingly diverse and adaptive. With their robust diversity, adaptability, and some unexpected behaviors, these small mammals have a lot more to offer than what meets the eye.

In the realm of wildlife, squirrels are a captivating spectacle with their swift movements, cheeky behavior, and their tendency to dart up and down trees. From their diverse family to their impressive size variations, from their toothy trivia to their unexpected societal contributions, here are ten fascinating facts that highlight the curious world of squirrels.

1. The Indian Giant Squirrel is the World’s Largest Squirrel Species

The Indian Giant Squirrel takes the crown for the largest squirrel species in the world. This impressive creature can grow up to a meter long, including its tail. Found predominantly in the Indian forests, they are known for their vibrant multi-colored fur and long, bushy tails. In stark contrast, the African Pygmy Squirrel, which is only about 13 centimeters long, is the smallest squirrel species, demonstrating the considerable size range within the squirrel family.

2. Over 200 Squirrel Species Exist Worldwide

There are over 200 distinct squirrel species around the globe, each uniquely adapted to their specific habitat. The family Sciuridae includes various species such as tree squirrels, ground squirrels, flying squirrels, prairie dogs, and chipmunks. From the deserts of Africa to the Arctic Tundra, you’ll find squirrels of all shapes and sizes thriving in different environments.

3. Squirrels’ Front Teeth Never Stop Growing

One of the squirrel’s defining characteristics is their sharp, chisel-like front teeth. These incisors are adapted to gnaw on a variety of foods, primarily nuts and seeds, and never stop growing throughout the squirrel’s life. This continuous growth ensures that their teeth don’t wear down despite their frequent use.

4. Prairie Dogs Build Extensive Burrow Systems

Although not technically dogs, Prairie Dogs are a type of ground squirrel known for their sophisticated, large burrow systems. These burrows, or “towns,” can span hundreds of acres and house thousands of individuals. Each town features various chambers for different purposes, such as nurseries, food storage areas, and sleeping quarters.

5. Tree Squirrels Share Nests to Keep Warm in Winter

In winter, tree squirrels exhibit an uncharacteristic social behavior: they share their nests. This behavior is believed to be an adaptive strategy for thermoregulation during cold months. By sharing body heat, these otherwise solitary creatures increase their chances of survival during the winter.

6. Squirrels Can Cause Power Outages

While they may look harmless, squirrels can unintentionally wreak havoc on our infrastructure. They have been known to chew through electrical wires, leading to power outages. In fact, they’re one of the leading causes of power disruptions in the United States.

7. Urban Squirrels in the U.S. Were Deliberately Introduced

While squirrels are a common sight in many American urban parks today, they weren’t always residents of these areas. In the 19th century, squirrels were deliberately introduced into urban parks to “beautify” them. The experiment was a success, and urban squirrels have become a staple of city parks across the country.

8. The Word “Squirrel” Comes From Ancient Greek

The term “squirrel” originated from the Ancient Greek word “Skiouros,” which translates to “shadow tail.” This name is apt as squirrels use their large, bushy tails for various functions, including shade from the sun, balance when climbing, and as a blanket during winter.

9. Invasive American Squirrels Are a Problem in Britain

The Eastern Grey Squirrel, native to North America, was introduced to Britain in the 19th century. These invasive squirrels have since become a problem, outcompeting the native red squirrels for resources and spreading diseases that are fatal to the local population.

10. Squirrels Play a Key Role in Forest Regeneration

Despite the trouble they can sometimes cause, squirrels are vital to forest ecosystems. They contribute to forest regeneration by burying nuts and seeds, many of which are forgotten and germinate into new trees. Moreover, squirrels serve as an important link in the food chain, as they are prey to numerous larger animals.


These fascinating facts illustrate just how complex and interesting squirrels are. Far from being simple backyard animals, squirrels are a diverse group of creatures with many surprising and unique characteristics.