The natural history of the northwoods .
All colors intensify at spawning time.
Native to eastern United States and Canada and has been widely introduced throughout the western states. They are most active in the morning and late afternoon. At night they can be found under banks, boulders, logs, and other shelters. Carnivorous, generalized feeders, consuming most insects and other small invertebrates. Known to eat their own eggs at spawning time and even their own young.