Top 12 Caterpillars Found in Illinois

Evergreen Bagworm Caterpillar:The caterpillar of the evergreen bagworm moth often baffles those who encounter it, resembling a moving pine cone to the naked eye.

Eastern Tent Caterpillar:Identifying eastern tent caterpillars is relatively easy. The larvae are covered in hair and bear blue, black, and orange patterns with a distinctive line running down their backs. 

Buck Moth Caterpillar:A full-grown buck moth caterpillar measures 2 to 2.5 inches in length, has a color ranging from brown to purplish black, and is speckled with numerous yellow spots.

Pipevine Swallowtail Caterpillar:The pipevine swallowtail caterpillar is distinctively purple with orange spots, and its body features long, thread-like protrusions.

Army Cutworm Caterpillar:Mature army cutworm caterpillars reach lengths of 1.5 to 2 inches. Their color ranges from gray to black, with the back being darker than the belly. 

Puss Caterpillar:The puss caterpillar grows to around an inch in length and has a furry appearance. Its body is covered in thick hairs that range in color from tan to grayish-white, narrowing towards the rear. 

Monarch Caterpillar:They possess antennae-like tentacles at both ends of their body and can grow up to two inches long. Their diet is exclusive to milkweed!

 Io Moth Caterpillar:The young Io moth caterpillar is reddish-brown in color, marked by six light-colored stripes and six rows of spine-bearing bumps.

Saddleback Caterpillar:Saddleback caterpillars stand out with their green backs, highlighted by a central brown dot encircled by white. 

Fall Webworm Caterpillar :These caterpillars have a diverse diet, feeding on over 100 different types of woody broadleaf plants, such as poplar, sycamore, and willow trees.

Garden Tiger Moth Caterpillar:The garden tiger caterpillar is quite eye-catching, as it is large and black with an abundant covering of long, dense black and ginger hairs.

White-Marked Tussock Moth Caterpillar:The white-marked tussock moth caterpillar is identifiable by its varying stripes and tufts, which can be either white or yellow.

Click Here