Western rattlesnake
- kingdom: Animalia
- phylum: Chordata
- class: Reptilia
- order: Squamata
- family: Viperidae
- genus: Crotalus
- species: Crotalus viridis
Lethbridge- Medicine Hat
Alberta- Oliver
- Summerland
British Columbia
Canada
El Sauzal
Baja California- Puerto Palomas
Chihuahua
Mexico
Albany- Avalon
- Bakersfield
- Banning
- Belmont
- Belvedere
- Berkeley
- Cabazon
- California City
- Cambrian Park
- Campbell
- Campo
- Chico
- Clearlake Oaks
- Delano
- Earlimart
- El Sobrante
- Eldridge
- Fairfax
- Fillmore
- Fresno
- Fullerton
- Gilroy
- Granite Bay
- Guerneville
- Hercules
- Highlands-Baywood Park
- Julian
- Kernville
- Ladera
- Lafayette
- Lebec
- Livermore
- Los Angeles
- Los Banos
- Los Gatos
- Marin City
- Mission Canyon
- Monte Sereno
- Montecito
- Monterey
- Morro Bay
- North Hollywood
- Pacific Grove
- Pinole
- Portola Valley
- Quincy
- Redding
- Saint Helena
- San Anselmo
- San Carlos
- San Diego
- San Leandro
- San Pedro
- Santa Barbara
- Santa Cruz
- Saratoga
- Sausalito
- Sierra Madre
- Spring Valley
- Tulare
- Universal City
- Valle Vista
- Vallejo
- Weaverville
- Woodside
- Yosemite Valley
- Yreka
California- Boise
Idaho- Big Sky
- Crow Agency
- Glendive
- Great Falls
- Harlowton
- Havre
Montana- Harrisburg
- Sidney
Nebraska- Powell
Ohio- Hermiston
- Pilot Rock
Oregon- Belle Fourche
- Box Elder
- Buffalo
- Deadwood
- Dupree
- Fort Pierre
- Murdo
- Onida
- Pierre
- Timber Lake
South Dakota- Blanding
- Provo
- Saint George
Utah- Cascade Valley
- Chelan
- Leavenworth
- Oroville
- Richland
- White Salmon
Washington
United States