7 Types of Rattlesnakes in California
7 types of rattlesnakes have a verified observation record in California. The most frequently recorded are Western Rattlesnake, Red Diamond Rattlesnake and Southwestern Speckled Rattlesnake. Here is the full list, ranked by how often each is reported on iNaturalist.
Quick Answer
7 types of rattlesnakes have a verified observation record in California. The most frequently recorded are Western Rattlesnake, Red Diamond Rattlesnake and Southwestern Speckled Rattlesnake. Here is the full list, ranked by how often each is reported on iNaturalist.
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Real sighting data, source iNaturalist
40,403 verified observations on iNaturalist of rattlesnake have been recorded in California, most often in May, April, June.
When rattlesnake are recorded in California
Verified species, source iNaturalist
7 types of rattlesnakes recorded in California
7 rattlesnake species have a verified observation record in California, each with at least 10 confirmed sightings. The full list, ranked by how often each is recorded, is below.
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Counts from verified iNaturalist observations.
The Western Rattlesnake (Crotalus oreganus) is the most commonly recorded, with 28,175 verified observations, about 70% of all rattlesnakes reported in California. If you spot a rattlesnake here, it is statistically most likely to be this one.