The queensnake averages 15 to 24 inches in length. It has a brown back and a yellow stripe along each lower side of the body. The belly is yellow with four brown stripes. The scales are keeled (ridged).
The queensnake may be found in the northeastern one-fourth of Illinois. This snake lives in creeks and rivers in forested regions. Although aquatic, it may take cover under rocks or brush along the water’s edge. The queensnake may ﬂatten its body when disturbed and/or release large amounts of bad-smelling musk from glands at the base of the tail. Mating occurs in spring. The female gives birth to from ﬁve to 20 young in late summer, the number depending upon her size and age. The queensnake eats mainly crayﬁsh, especially those that have just shed their exoskeleton.