Northern Leopard Frog
The northern leopard frog usually has two or three rows of irregular dark spots with light margins along its back. A dark spot on its snout is also prominent. This three-and-a-half-inch frog is found in northern Illinois. During the warm summer months, this frog wanders far away from the streams, ponds and sloughs where it normally lives. It feeds heavily on the insects found in grassy or weedy fields far away from the water. It breeds from mid-March to May, and the call can be imitated by rubbing the thumb over an inflated balloon.