Western Diamondback Rattlesnake
Western Diamondback RattlesnakeWestern Diamondback RattlesnakeWestern Diamondback RattlesnakeWestern Diamondback Rattlesnake

Western Diamondback Rattlesnake

Crotalus atrox

Least ConcernNear ThreatenedVulnerableEndangeredCritically Endangered Endemic
5–10% · With luck
overall probability at Cumbres de Monterrey National Park
14 Verified records at Cumbres de Monterrey National Park
September Best month highest sighting rate
🌙 Nocturnal When it's active during nighttime hours (6pm–6am)

The western diamondback rattlesnake (Crotalus atrox) or western diamond-backed rattlesnake, is a rattlesnake species and member of the viper family, found in the southwestern United States and Mexico. Like all other rattlesnakes and all other vipers, it is venomous. It is likely responsible for the majority of snakebite fatalities in northern Mexico and the greatest number of snakebites in the U.S. No subspecies are currently recognized. It lives in elevations from below sea level up to 6,500 feet (2,000 m). This species ranges throughout the Southwestern United States and northern half of Mexico. Currently, western diamondback rattlesnakes are not threatened or endangered. Wikipedia →

5–10% of wildlife watchers report a Western Diamondback Rattlesnake sighting in Cumbres de Monterrey National Park, based on 14 days of visitor records from GBIF citizen-science data.

Closest Relatives at Cumbres de Monterrey National Park

Tamaulipan Rock Rattlesnake
Endemic

Tamaulipan Rock Rattlesnake

☀️ Diurnal Reptile

Crotalus morulus

5–10% · With luck
Totonacan Rattlesnake
LC Endemic

Totonacan Rattlesnake

☀️🌙 Day & Night Reptile

Crotalus totonacus

<5% · Rare
Rock Rattlesnake
LC

Rock Rattlesnake

☀️🌙 Day & Night Reptile

Crotalus lepidus

<5% · Rare
Western Black-tailed Rattlesnake
LC

Western Black-tailed Rattlesnake

☀️🌙 Day & Night Reptile

Crotalus molossus

<5% · Rare
Mohave Rattlesnake
LC

Mohave Rattlesnake

☀️🌙 Day & Night Reptile

Crotalus scutulatus

Insufficient data
Twin-spotted Rattlesnake
LC

Twin-spotted Rattlesnake

☀️ Diurnal Reptile

Crotalus pricei

<5% · Rare
Eastern Black-tailed Rattlesnake

Eastern Black-tailed Rattlesnake

☀️🌙 Day & Night Reptile

Crotalus ornatus

<5% · Rare
Taylor's Cantil
LC Endemic

Taylor's Cantil

☀️🌙 Day & Night Reptile

Agkistrodon taylori

<5% · Rare

📅 Monthly Probability

<5
Jan
<5
Feb
5–10
Mar
5–10
Apr
5–10
May
5–10
Jun
5–10
Jul
10–20
Aug
10–20
Sep
10–20
Oct
5–10
Nov
<5
Dec

🌙 When They're Spotted

Most active during nighttime hours (6pm–6am) · across all parks (global)

🌙Nocturnal
☀️🌙🌙12am6am12pm6pm12am

Global Distribution

Where this species is recorded worldwide. Restricted to human observations from 2019 onwards — the same kind of record and the same period the probabilities on this page are built from, so collar-tracking studies, camera-trap arrays and museum specimens are excluded. Around Santa Rosa that removes 5,924 GPS fixes from a handful of tagged jaguars.

where this species is recorded (GBIF density — it tracks where observers go, not how likely a sighting is)  ·  parks where it occurs — tap a pin for the sighting probability there

Parks Where Found

# Park Country Probability
1 Big Bend National Park 🇺🇸 United States
40–50%
2 Guadalupe Mountains National Park 🇺🇸 United States
30–40%
3 Cumbres de Monterrey National Park 🇲🇽 Mexico
5–10%
4 Joshua Tree National Park 🇺🇸 United States
<5%

Quick answers

What are the chances of seeing a Western Diamondback Rattlesnake in Cumbres de Monterrey National Park?

About 7% of wildlife watchers report a Western Diamondback Rattlesnake sighting in Cumbres de Monterrey National Park, based on 14 days of visitor records from GBIF citizen-science data.

When is the best time to see Western Diamondback Rattlesnake in Cumbres de Monterrey National Park?

September has the highest sighting rate for Western Diamondback Rattlesnake in Cumbres de Monterrey National Park in our monthly data.

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