Virile Crayfish - Montana Field Guide

Virile Crayfish (Northern Crayfish) Missouri Department of Conservation

Calico Crayfish - Montana Field Guide

Rusty Crayfish - Montana Field Guide

Crawfish: Camouflaged and Colorful Crustaceans

Wild and Free Montana: Crayfish Confrontation

Virile Crayfish - Montana Field Guide

Images of Pacifastacus connectens (A) and Pacifastacus gambelii (B).

Virile Crayfish - Montana Field Guide

Crawfish: Camouflaged and Colorful Crustaceans

WISC - Washington Invasive Species Council

Virile Crayfish - Orconectes virilis

Virile Crayfish - Montana Field Guide

Pilose Crayfish - Montana Field Guide