Aquatic Organisms of Colorado

Aquatic Insects: Brief descriptions and sketches of 7 aquatic insects found in Colorado mountain streams.
Native Fish of Colorado: Brief descriptions of the distribution and characteristics of the native fish. A few illustrations are provided.
Cold Water Sport Fish of Colorado: Descriptions and illustrations of cold water sport fish in Colorado.
Warm Water Sport Fish of Colorado: Descriptions and illustrations of warm water sport fish in Colorado.
Threatened and Endangered Fish of Colorado: Colorado has 5 fish species listed as "endangered" and 2 fish species listed as "threatened." A brief description of each fish and some pictures of the fish are provided.

For more information on wildlife in Colorado, contact the Colorado Division of Wildlife.