Police said there was a possible sighting of the animal near 83rd and County Line Road.
A coywolf is a mix between a wolf and a coyote, and is larger than a typical coyote.
READ MORE: Could the 'coywolf' hybrid come to Chicago?
Coyotes are common in Illinois, and have been spotted in residential areas. In 2017, coyotes were seen crossing the street and running through yards in Arlington Heights. There are believed to be thousands of coyotes living and thriving in the Chicago area, and generally keeping their distance from humans.
The coywolf hybrid, on the other hand, is extremely rare in Illinois, experts say. If you think you see one, keep your distance and call 911.