Chihuahuan Nightsnake
Hypsiglena jani
- KingdomAnimalia (Animals)
- PhylumChordata (Cordats)
- ClassSquamata
- FamilyColubridae (Colúbrids)
- GenusHypsiglena (Night Snakes)
- SpeciesHypsiglena jani (Chihuahuan Nightsnake)
Hypsiglena jani, commonly known as the Texas night snake or the Chihuahuan night snake, is a small species of mildly venomous snake in the subfamily Dipsadinae of the family Colubridae. The species is native to the southwestern United States and adjacent northeastern Mexico. Wikipedia →
20–30% of wildlife watchers report a Chihuahuan Nightsnake sighting in Big Bend National Park, based on 80 days of visitor records from GBIF citizen-science data.
Closest Relatives at Big Bend National Park
Trans-pecos Ratsnake
Bogertophis subocularis
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 | Cumbres de Monterrey National Park | 🇲🇽 Mexico | |
| 3 | Guadalupe Mountains National Park | 🇺🇸 United States |
Quick answers
What are the chances of seeing a Chihuahuan Nightsnake in Big Bend National Park?
About 23% of wildlife watchers report a Chihuahuan Nightsnake sighting in Big Bend National Park, based on 80 days of visitor records from GBIF citizen-science data.
When is the best time to see Chihuahuan Nightsnake in Big Bend National Park?
September has the highest sighting rate for Chihuahuan Nightsnake in Big Bend National Park in our monthly data.