Black-necked Gartersnake
Thamnophis cyrtopsis
- KingdomAnimalia (Animals)
- PhylumChordata (Cordats)
- ClassSquamata
- FamilyColubridae (Colúbrids)
- GenusThamnophis (Garter Snakes)
- SpeciesThamnophis cyrtopsis (Black-necked Gartersnake)
Closest Relatives at Cumbres de Monterrey National Park
Western Ribbon Snake
Thamnophis proximus
Checkered Garter Snake
Thamnophis marcianus
Northern Cat-eyed Snake
Leptodeira septentrionalis
Great Plains Ratsnake
Pantherophis emoryi
Baird's Ratsnake
Pantherophis bairdi
Speckled Racer
Drymobius margaritiferus
Diamondback Watersnake
Nerodia rhombifer
Central American Indigo Snake
Drymarchon melanurus
Nuevo Leon Graceful Brown Snake
Rhadinaea montana
Mexican Parrot Snake
Leptophis mexicanus
Red Black-headed Snake
Tantilla rubra
Gopher Snake
Pituophis catenifer
📅 Monthly Probability
☀️ When They're Spotted
Most active during daytime hours (6am–6pm) · 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 | |
| 4 | Grand Canyon National Park | 🇺🇸 United States |
Quick answers
What are the chances of seeing a Black-necked Gartersnake in Cumbres de Monterrey National Park?
About 4% of visitor-days record a Black-necked Gartersnake sighting in Cumbres de Monterrey National Park, based on 6 observer-days of citizen-science data from GBIF.
When is the best time to see Black-necked Gartersnake in Cumbres de Monterrey National Park?
July has the highest sighting rate for Black-necked Gartersnake in Cumbres de Monterrey National Park in our monthly data.