Eastern Patch-nosed Snake

Eastern Patch-nosed Snake

Salvadora grahamiae

Silhouette: Alex Slavenko · PhyloPic

Least ConcernNear ThreatenedVulnerableEndangeredCritically Endangered
Daily sighting probability ~10% · With luck
at Big Bend National Park
13 Verified sightings at Big Bend National Park From 2019 to 2026
33 Verified sightings across all 3 parks From 2019 to 2026
September Best month highest sighting rate
☀️ Diurnal When it's spotted during daytime hours (6am–6pm)

About the Eastern Patch-nosed Snake

Salvadora grahamiae, also known commonly as the eastern patch-nosed snake and the mountain patchnose snake, is a species of snake in the family Colubridae. The species is native to the southwestern United States and adjacent northeastern Mexico.

The specific name, grahamiae, is in honor of Colonel James Duncan Graham, United States Army Corps of Topographical Engineers. S. grahamiae is found in the US states of Arizona, New Mexico, and Texas, and in the Mexican states of Chihuahua, Coahuila, Querétaro, Tamaulipas, and Veracruz.

S. grahamiae occurs in a wide variety of habitats including forest, savanna, shrubland, grassland, and desert, at altitudes from sea level to 1,980 m (6,500 ft). S. grahamiae may attain a total length (including tail) of 47 in (120 cm). It has eight upper labials. The posterior chin shields touch or are separated by only one small scale.

S. grahamiae preys predominately upon lizards, especially those of the genus Aspidoscelis. It also eats reptile eggs, small snakes, nestling birds, and small mammals. S. grahamiae is oviparous. Eggs are laid in April–June, and... Wikipedia →

Global Distribution

Warmer areas are where this animal is recorded most often.

Parks Where Found

# Park Country Daily sighting probability
1 Guadalupe Mountains National Park 🇺🇸 United States
~20%
2 Big Bend National Park 🇺🇸 United States
~10%
3 Saguaro National Park 🇺🇸 United States
<5%

Quick answers

What are the chances of seeing a Eastern Patch-nosed Snake in Big Bend National Park?

About 10% of wildlife watchers report a Eastern Patch-nosed Snake sighting in Big Bend National Park, based on 13 verified sightings from GBIF citizen-science data.

When is the best time to see Eastern Patch-nosed Snake in Big Bend National Park?

September has the highest sighting rate for Eastern Patch-nosed Snake in Big Bend National Park in our monthly data.

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