Project Squirrel was originally created by Wendy Jackson and Joel Brown, and has been operating since 1997. During this time, more than 1,000 people have participated, provided observations, and filled out the project's survey. Participants have been able to learn a great deal about these squirrels, at first in the Chicago Metropolitan Region and now throughout the U.S.

Squirrels are worth studying because they are active during the day and everyone has an opinion about them. Additionally, squirrels can be important indicators of local ecology because they are resident in small territories and active year round, they require a range of resources that are also important to many other urban animals, and their populations rise and fall with the same predators and environmental conditions that affect our neighborhood wildlife.

No matter where you live, if there are squirrels in your neighborhood, you are encouraged to join Project Squirrel and become a squirrel monitor. Fox squirrels and grey squirrels are two of the most familiar species of wildlife in many neighborhoods and natural areas. To gain this insight, we must gather data about as many individual squirrels in as many places as possible.