Saddleback moth caterpillar

The caterpillars are primarily green with brown at either end, and a prominent, white-ringed brown dot in the center which resembles a saddle, hence the name. Stings from the protruding spines can be very painful and can cause swelling, nausea, and a rash that can last for days. They feed on a large variety of plants, and the adults are dark brown, stout-bodied moths.