Rusty crayfish, an aquatic nuisance and an invasive species, has been discovered in a Larimer County river south of Estes Park, according to Colorado Parks and Wildlife.

The rusty crayfish is a prohibited aquatic nuisance species due to their voracious appetite on critical habitat vegetation ...

CPW has confirmed the presence of invasive rusty crayfish in the West Fork Little Thompson River, impacting Colorado's ...

Rusty crayfish, an aquatic nuisance and an invasive species, has been discovered in a Larimer County river south of Estes Park, according to Colorado Parks and Wildlife. This is the first time the ...