Twin-spotted rattlesnake (Crotalus pricei)
The twin-spotted rattlesnake is a venomous pit viper in the family Viperidae. GBIF holds 152 licensed U.S. records of it; it reaches our listing threshold in 1 state, most of all Arizona (152).
Common names: twin-spotted rattlesnake, western twin-spotted rattlesnake, more Crotalus pricei is a species of venomous snake, a pit viper in the family Viperidae. The species is endemic to the southwestern United States and northern Mexico. Two subspecies are recognized.
From Wikipedia: Crotalus pricei, text under CC BY-SA 4.0.
Is the twin-spotted rattlesnake poisonous or venomous?
Yes. The twin-spotted rattlesnake is a pit viper (family Viperidae), like every rattlesnake, copperhead and cottonmouth in the U.S. Its bite needs emergency care: call 911 and keep the bitten limb still. Antivenom is given in hospital.
Snakes often mistaken for it
Species commonly confused with rattlesnakes and recorded in the same states: gopher snake (recorded in the same state) and plains hog-nosed snake (recorded in the same state).
Which states have the twin-spotted rattlesnake?
All listed records come from a single state, Arizona, with 152 records.
| # | State | Records | Share of state snakes | Rank in state |
|---|---|---|---|---|
| 1 | Arizona | 152 | 0.7% | 31st of 60 |
How recent are the twin-spotted rattlesnake records?
The twin-spotted rattlesnake record leans on older material: only 9% of dated U.S. records come from 2016–2025, and the median record is from 1964. The oldest dated record is from 1893; the busiest year was 1956, with 11 records.
| Decade | Records | Share |
|---|---|---|
| 1890s | 4 | 4.0% |
| 1910s | 3 | 3.0% |
| 1920s | 6 | 6.0% |
| 1930s | 6 | 6.0% |
| 1940s | 4 | 4.0% |
| 1950s | 23 | 23.0% |
| 1960s | 14 | 14.0% |
| 1970s | 9 | 9.0% |
| 1980s | 14 | 14.0% |
| 1990s | 3 | 3.0% |
| 2000s | 1 | 1.0% |
| 2010s | 8 | 8.0% |
| 2020s | 5 | 5.0% |
Species recorded in the same counties
Of the 5 counties where the twin-spotted rattlesnake is most recorded, 5 are also top counties for each of the first seven snakes in the table below; no other snake shares more.
| Species | Shared counties |
|---|---|
| Blackneck garter snake | 5 |
| California kingsnake | 5 |
| Desert nightsnake | 5 |
| Glossy snake | 5 |
| Gopher snake | 5 |
| Prairie rattlesnake venomous | 5 |
| Ring-necked snake | 5 |
| Arizona black rattlesnake venomous | 4 |
Related species in the U.S.
Other species of the genus Crotalus with profiles here: Western rattlesnake, Western diamondback rattlesnake, Prairie rattlesnake, Sidewinder, Timber rattlesnake, Mohave rattlesnake, Red diamond rattlesnake and Black-tailed rattlesnake.
GBIF records read 2026-09-29. Listed: any license. Counted: CC0/CC BY only. How we count.