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.

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 ...

DENVER — An aggressive aquatic nuisance species was found in a northeastern Colorado river.According to Colorado Parks and Wildlife, rusty crayfish have been located in the West Fork Little ...