Centipedes and Leeches Centipedes and Leeches Centipedes are not insects. They are multi-segmented, elongated arthropods with a distinct head and one pair of legs per segment. The centipede Scolopendra viridis.
Centipedes are active at night when they prey on insects and other arthropods.
They nest outdoors under stones, boards, bark and other moist protected places. Bites from the large centipede are rare. The pain associated with the bite from S. viridis can be intense, lasting for several hours. Leeches are members of a group of segmented worms that live in fresh waterponds, marshes, lakes and streams. A fresh water leech feeding between toes.