Western rattlesnake

The Western rattlesnake is classified as Least Concern. Does not qualify for a more at risk category. Widespread and abundant taxa are included in this category.

Size: The Western Rattlesnake can reach lengths slightly over 4 feet, but 2 1/2 feet is more the norm. Coloration: The Western Rattlesnake (Crotalus viridis) is a widely distributed and highly variable species. More

Western rattlesnakes often hibernate in large numbers in rock crevices on south-facing slopes. They emerge between March and May and then disperse to their summer habitats. More

Geographical Variation: The Western Rattlesnake is an extremely variable species both within populations and between populations. The currently recognized distinct geographical populations (subspecies) are: Prairie Rattlesnake (C. v. viridis): Usually with greenish tinge. More

Western rattlesnakes in Washington State based on ecological region, land cover and elevation, courtesy of the University of Washington. More

a western rattlesnake which can become quite nasty when provoked. The Diamondback is responsible for most deaths due to snakebite in the U.S. The Prairie Rattler; a smaller snake found in the great plains, also with a relatively nasty disposition. More

The taxonomy of Western Rattlesnakes is controversial and still being studied. Some researchers still use the species Crotalus viridis and this snake remains Crotalus viridis helleri . In a 2002 study, Douglas, Douglas, Schuett, Porras, & Holycross . Pp. More

There are three subspecies of Western Rattlesnake that occur in Idaho, and they are different enough in coloration to warrant additional description. The subspecies with the smallest range in Idaho is the the Prairie Rattlesnake (Crotalus viridis viridis). More

DIET: The Western Rattlesnake feeds on rats, squirrels, mice, lizards, and birds. It uses venom injected through long, hollow, retractable fangs to kill and begin digesting its prey. REPRODUCTION: Young are born in summer. More

Western Rattlesnake, Crotalus viridis - Washington herp atlas Western Rattlesnake- Burke Museum The Western Rattlesnake - BC Books Venomous Reptiles of North America Rattlesnake: Portrait of a Predator Rattlesnakes: Their Habits, Life Histories, and Influence More

The Western Rattlesnake is from the order Squamata. Species from this order are amphisbaenians, lizards or snakes. There are over 6,000 living species belonging to the squamata order - it is the largest order of all reptiles. More

Common names

abyssus in English - English
northern pacific rattlesnake in English - English
Pazifik-Klapperschlange in German - Deutsch
western rattlesnake in English - English

Picture of Crotalus oreganus has been licensed under a Creative Commons Attribution-Noncommercial.
Original source: Flickr
-acorbit -Author: acorbit
Permission: Some rights reserved
Order : Squamata
Family : Viperidae
Genus : Crotalus
Species : Crotalus oreganus
Authority : Holbrook, 1840