No centipedes are lethal to humans, although a few of the larger tropical varieties can inflict very painful bites that require medical attention. Some of the centipedes are almost microscopic, but most are around 1-2 cm long. One group of tropical centipedes, however, grow to over one foot long. Centipedes are fairly common at the Teter Nature Trail, although finding one requires flipping a few rocks or logs. Yet another class of arthropods are the crustaceans.
Crustaceans have appendages that vary in number.
They have a pair of appendages on each segment of their head and thorax, they also have 2 pairs of antennae. Most crustaceans are aquatic, so you probably will not see a crawdad or lobster on the trail. Like all crustaceans, isopods breathe through gills. Therefore, these small crustaceans must live in a fairly moist environment. Sowbugs are terrestrial isopods that can curl up into a tight ball.