Crotalus oreganus concolor

Common names: midget faded rattlesnake, yellow rattlesnake, faded rattlesnake.^[2]

Crotalus oreganus concolor is a venomous pitviper subspecies^[3] found in the western United States. A small species known for its faded color pattern.

Additional recommended knowledge

Essential Laboratory Skills Guide

Safe Weighing Range Ensures Accurate Results

Daily Visual Balance Check

Description

Grows to a maximum length of 750 mm. The smallest gravid female measured was 522 mm.^[4]

The color pattern consists of a pinkish, pale brown, yellow-brown, straw-colored, reddish or yellow-brown ground color, overlaid with a series of brown elliptical or rectangular dorsal blotches. However, most specimens are gray or silvery. In juveniles the pattern is distinct, but becomes faded in adults, almost to the point where it is indistinguishable from the ground color.^[5]

Geographic range

Found in the United States in the Colorado and Green River basins. This area covers southwestern Wyoming, Utah east of long. 111° West (excluding the southeastern corner) and extreme east-central Colorado.^[4] The type locality given is "King's Ranch, Garfield Co., at the base of the Henry Mts [Utah]."^[1]

See also

• List of crotaline species and subspecies
• Crotalus by common name
• Crotalus by taxonomic synonyms
• Crotalinae by common name
• Crotalinae by taxonomic synonyms
• Snakebite

References