Trans-pecos Ratsnake
Bogertophis subocularis
- KingdomAnimalia (Animals)
- PhylumChordata (Cordats)
- ClassSquamata
- FamilyColubridae (Colúbrids)
- GenusBogertophis
- SpeciesBogertophis subocularis (Trans-pecos Ratsnake)
The Trans-Pecos rat snake or Davis Mountain rat snake (Bogertophis subocularis), is a species of medium to large, nonvenomous rat snake in the family Colubridae. Bogertophis subocularis is endemic to the Chihuahuan Desert. Wikipedia →
20–30% of wildlife watchers report a Trans-pecos Ratsnake sighting in Big Bend National Park, based on 117 days of visitor records from GBIF citizen-science data.
Closest Relatives at Big Bend National Park
Chihuahuan Nightsnake
Hypsiglena jani
Coachwhip
Masticophis flagellum
Long-nosed Snake
Rhinocheilus lecontei
Gopher Snake
Pituophis catenifer
Great Plains Ground Snake
Sonora episcopa
Black-necked Gartersnake
Thamnophis cyrtopsis
Big Bend Patchnose Snake
Salvadora deserticola
Baird's Ratsnake
Pantherophis bairdi
Plain-bellied Water Snake
Nerodia erythrogaster
Glossy Snake
Arizona elegans
Striped Whipsnake
Masticophis taeniatus
Checkered Garter Snake
Thamnophis marcianus
📅 Monthly Probability
🌙 When They're Spotted
Most active during nighttime hours (6pm–6am) · across all parks (global)
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 | |
| 2 | Guadalupe Mountains National Park | 🇺🇸 United States | |
| 3 | Cumbres de Monterrey National Park | 🇲🇽 Mexico |
Quick answers
What are the chances of seeing a Trans-pecos Ratsnake in Big Bend National Park?
About 28% of wildlife watchers report a Trans-pecos Ratsnake sighting in Big Bend National Park, based on 117 days of visitor records from GBIF citizen-science data.
When is the best time to see Trans-pecos Ratsnake in Big Bend National Park?
September has the highest sighting rate for Trans-pecos Ratsnake in Big Bend National Park in our monthly data.