In general, Pipevine swallowtail caterpillars are not thought of as pests. In fact, some people plant Pipevines in their yard for the sole purpose of attracting the Pipevine swallowtail butterflies that these caterpillars eventually become.
The hickory tussock moth begins its life as a white caterpillar. It is not a fully white caterpillar, however, as it has an attractive design of black tufts along the middle of the back, with black spots down the sides of its body and a black head.
Caterpillars are a common sight in many gardens and yards during the warmer months and these can have a destructive impact on your well tended greenery. There are many typical varieties including white caterpillars and green clover worm although an unusual looking species to be sure is the puss caterpillar.
The hickory horned devil is an unusual-looking caterpillar with green coloration and spikes that resemble horns all over its body. No need to worry, though. This caterpillar is relatively harmless to humans.
Caterpillars are brightly colored or camouflaged to protect themselves from their predators. Some caterpillars have hairs or spines that are loaded with poisons that will give you a painful sting if you touch them. Resist the urge. I have been stung myself and it is no fun.