There are many species of millipedes, most of which are long, cylindrical, many-segmented, worm-like creatures. There are however, some millipedes, such as O.gracilus, that are flattened. Every millipede has two pairs of legs attached to each apparent body segment. Most millipedes are brown or black, but some species are orange or red. They range in size from 5/8 to 4-inches in length.