Western Rattlesnake

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	Sequoia and Kings Canyon National Parks	🇺🇸 United States	40–50%
2	Grand Canyon National Park	🇺🇸 United States	30–40%
3	Zion National Park	🇺🇸 United States	30–40%
4	Yosemite National Park	🇺🇸 United States	30–40%
5	Death Valley National Park	🇺🇸 United States	10–20%
6	Channel Islands National Park	🇺🇸 United States	10–20%
7	Joshua Tree National Park	🇺🇸 United States	0–10%
8	Redwood National Park	🇺🇸 United States	Insufficient data
9	El Vizcaíno Biosphere Reserve	🇲🇽 Mexico	Insufficient data

Quick answers

What are the chances of seeing a Western Rattlesnake in Yosemite National Park?

About 31% of visitor-days record a Western Rattlesnake sighting in Yosemite National Park, based on 185 observer-days of citizen-science data from GBIF.

When is the best time to see Western Rattlesnake in Yosemite National Park?

June has the highest sighting rate for Western Rattlesnake in Yosemite National Park in our monthly data.