The Common Crayfish is a freshwater crustacean widespread in eastern streams, with a mottled olive-brown to greenish body and large claws used for defense and food gathering. It is a keystone species in stream ecosystems, serving as prey for fish, birds, and mammals while itself consuming algae, invertebrates, and detritus. Crayfish excavate burrows in streambanks that are used by other species.
Habitat
Clear, cool streams, ponds, and rocky lake bottoms
Diet
Adults: algae, aquatic invertebrates, carrion, and plant material
How common
Common
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