River Worm (diplocardia Riparia): Species Accounts
Physical characteristics: The river worm has a dark brown body 4.7 to 7.8 inches (120 to 200 millimeters) in length. It has small pairs of lengthwise grooves underneath the body.
Geographic range: The river worm is found in the Central United States, including Iowa, Illinois, Missouri, Kansas, and Nebraska.
Habitat: River worms live in fine soils washed up along river banks and beneath stands of silver maples.
Diet: They burrow through leaf litter and just below the soil surface, eating detritus buried in river mud.
Behavior and reproduction: Nothing has been written about their behavior. River worms have both male and female reproductive organs.
River worms and people: River worms are collected and sold for fish bait. This species is more tolerant of summer heat than other bait species.
Conservation status: This species is not considered endangered or threatened. However, exotic species brought in as fish bait have become established along some rivers and streams, crowding out the river worm. ∎
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Animal Life ResourceMollusks, Crustaceans, and Related SpeciesEarthworms: Oligochaeta - Physical Characteristics, Behavior And Reproduction, Conservation Status, River Worm (diplocardia Riparia): Species Accounts - GEOGRAPHIC RANGE, HABITAT, DIET, EARTHWORMS AND PEOPLE