Not all species of leeches are hematophagous (blood-feeding). Some eat worms, snails, and aquatic insects.

They are usually found in shallow, slow-moving freshwater.

When their habitat freezes or dries out, they bury themselves in the mud and lay dormant until the environment is habitable for them again.

Because leeches cannot hear and have a very poor sense of sight, they communicate with each other through chemicals and touch.

They lay eggs in cocoons, and when the babies hatch, they look and act like the adults.