Rusty crayfish, an ‘aquatic nuisance,’ discovered in northern Colorado river The invasive species was reported on April 7 in Larimer County’s West Fork Little Thompson River ...

A Colorado resident first reported sighting the rusty crawfish through the species identification app iNaturalist on April 7. CPW performed a follow-up survey and collected samples the following day.

LARIMER COUNTY, Colo — A non-native crustacean has been discovered in the Little Thompson River for the first time. Colorado Parks and Wildlife (CPW) confirmed the presence of rusty crayfish in ...

Rusty crayfish, an invasive species, has been discovered in the Little Thompson River in Larimer County, Colorado. This aggressive crayfish, known for its big appetite and rapid reproduction ...