Eastern Black-tailed Rattlesnake

Closest Relatives at Big Bend National Park

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	30–40%
2	Guadalupe Mountains National Park	🇺🇸 United States	20–30%
3	Cumbres de Monterrey National Park	🇲🇽 Mexico	<5%

Quick answers

What are the chances of seeing a Eastern Black-tailed Rattlesnake in Big Bend National Park?

About 34% of visitor-days record a Eastern Black-tailed Rattlesnake sighting in Big Bend National Park, based on 136 observer-days of citizen-science data from GBIF.

When is the best time to see Eastern Black-tailed Rattlesnake in Big Bend National Park?

August has the highest sighting rate for Eastern Black-tailed Rattlesnake in Big Bend National Park in our monthly data.