5 Types of Rattlesnakes in Utah

5 types of rattlesnakes have a verified observation record in Utah. The most frequently recorded are Western Rattlesnake, Mojave Rattlesnake and Sidewinder. Here is the full list, ranked by how often each is reported on iNaturalist.

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5 types of rattlesnakes have a verified observation record in Utah. The most frequently recorded are Western Rattlesnake, Mojave Rattlesnake and Sidewinder. Here is the full list, ranked by how often each is reported on iNaturalist.

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Real sighting data, source iNaturalist

2,927 verified observations on iNaturalist of rattlesnake have been recorded in Utah, most often in May, June, July.

When rattlesnake are recorded in Utah

Verified species, source iNaturalist

5 types of rattlesnakes recorded in Utah

5 rattlesnake species have a verified observation record in Utah, each with at least 10 confirmed sightings. The full list, ranked by how often each is recorded, is below.

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    1

    Western Rattlesnake

    Crotalus oreganus

    2,632 recordsNative
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    2

    Mojave Rattlesnake

    Crotalus scutulatus

    93 recordsNative
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    3

    Sidewinder

    Crotalus cerastes

    82 recordsNative
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    4

    Prairie Rattlesnake

    Crotalus viridis

    73 recordsNative
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    5

    Southwestern Speckled Rattlesnake

    Crotalus pyrrhus

    41 recordsNative

Counts from verified iNaturalist observations.

The Western Rattlesnake (Crotalus oreganus) is the most commonly recorded, with 2,632 verified observations, about 90% of all rattlesnakes reported in Utah. If you spot a rattlesnake here, it is statistically most likely to be this one.

Utah also hosts less common rattlesnakes such as Mojave Rattlesnake, Sidewinder and Prairie Rattlesnake, each recorded fewer than 100 times. These are the species worth a second look when you are out, since a sighting is more notable.