What Species of Squirrel is Most Common in Illinois?
If you’re living in Illinois, you probably have seen a squirrel at some point. They can be found almost anywhere there are trees, but the two most common species are the gray and fox. These animals are well adapted to living with humans in cities, and are especially common near human structures, such as power lines. But if you’re wondering what species of squirrels are native to Illinois, read on to learn more about these animals.
Southern Flying Squirrel
The Southern Flying Squirrel is an avian mammal. Although it lacks wings, this species does possess a special membrane between its front and back legs that allows it to glide. By spreading its limbs, the flying squirrel is able to cover up to 150 feet in one glide. The flying squirrel is the largest flying mammal in the United States, so locating a population in Illinois is imperative for protecting its future.
Fox
Among the four major squirrel species found in Illinois, the Fox is the most common, while the raccoon is a close second. Squirrels have 4 permanent front teeth and gnaw on rough materials, such as nuts. Known as tree squirrels, they are often found in parks and woodlands. They are excellent climbers and have two breeding seasons a year. The lifespan of these rodents varies, depending on food availability and predators.
Red
The Red Squirrel is one of the most common species of wildlife in Illinois, and is known to be very active in the early morning and late afternoon. While they do have a number of diseases, these rodents aren’t a public health concern in Illinois. However, there are a number of ways to spot one if you’re out looking for one. Read on to learn how to spot one, and how to protect your home from them.
Eastern Grey
The Eastern Gray squirrel is the most common wild squirrel species in Illinois. Historically, this species was rarely seen in the Chicago Metropolitan area. Today, these squirrels live in wealthier neighborhoods while foxes prefer less-affluent areas. In the 1990s, University of Illinois at Chicago professor Joel Brown began studying wildlife in exotic locations around the world. He co-founded Project Squirrel in 1997, an organization that monitors and tracks squirrel populations.
Red squirrel
The red squirrel is one of the most commonly observed mammals in the state, but you may be surprised to learn that Illinois is home to three species of this rodent. Although native to the state, the Eastern Gray Squirrel is an invasive species in other areas of the country and Europe. This species can cause severe problems for local wildlife because of its ability to outcompete and displace native species. If you see a red squirrel in your yard, you should take action right away!
Gray squirrel
The two dominant squirrel species in the Chicago area are the gray and fox. Gray squirrels live in neighborhoods of higher income, while fox squirrels prefer less affluent areas. Professor Joel Brown has been studying these creatures for over a decade. He co-founded the organization Project Squirrel in 1997, which has helped to identify some of the squirrel species that live in Illinois. This video shows how the two squirrel species are different, and explains their differences.
Captive fox squirrel
The captive fox squirrel is one of the most common species of rat in Illinois. Its distribution is most prevalent across the Midwest. The animal is commonly kept as pets, but its range is far beyond that of the city’s other rat species. Nevertheless, its unique features and behavior make it an ideal candidate for conservation and research efforts. This species is native to Illinois, and is highly adapted to the urban environment.
What is the most common species of squirrel found in IL?
The most common species of squirrel found in IL is the Fox Squirrel.
What is the scientific name for the most common species of squirrel found in IL?
The scientific name for the most common species of squirrel found in IL is Sciurus niger.
What is the average lifespan of the most common species of squirrel found in IL?
The average lifespan of the most common species of squirrel found in IL is about 9 years.
What is the average weight of the most common species of squirrel found in IL?
The average weight of the most common species of squirrel found in IL is about 1.
5 pounds.
What is the average length of the most common species of squirrel found in IL?
The average length of the most common species of squirrel found in IL is about 20 inches.
What is the average width of the most common species of squirrel found in IL?
The average width of the most common species of squirrel found in IL is about 8 inches.
What is the average height of the most common species of squirrel found in IL?
The average height of the most common species of squirrel found in IL is about 12 inches.
What is the average number of babies born to the most common species of squirrel found in IL?
The average number of babies born to the most common species of squirrel found in IL is about 2-4.
What is the average gestation period for the most common species of squirrel found in IL?
The average gestation period for the most common species of squirrel found in IL is about 44 days.
What is the average litter size for the most common species of squirrel found in IL?
The average litter size for the most common species of squirrel found in IL is about 2-5.
When is the most common time of year for the most common species of squirrel found in IL to have babies?
The most common time of year for the most common species of squirrel found in IL to have babies is in the spring.
What do baby squirrels eat?
Baby squirrels eat their mother’s milk for the first few weeks of their lives and then start to eat solid food.
What do adult squirrels eat?
Adult squirrels eat a variety of things including nuts seeds fruit fungi and bark.
What is the most common predator of the most common species of squirrel found in IL?
The most common predator of the most common species of squirrel found in IL is the coyote.
What is the second most common predator of the most common species of squirrel found in IL?
The second most common predator of the most common species of squirrel found in IL is the hawk.

Jessica Watson is a PHD holder from the University of Washington. She studied behavior and interaction between squirrels and has presented her research in several wildlife conferences including TWS Annual Conference in Winnipeg.