Below are images of leaf-litter arthropod insects that can be found in the high Appalachian Mountains. The highest peaks of the Appalachian Mountains are home to many animal species, including arthropods, found nowhere else on Earth. Clemson University entomology professor Michael Caterino is leading a study to thoroughly document arthropods such as insects, millipedes and their relatives living in leaf litter located in forests found on the mountains.