Otospermophilus beecheyi
Silhouette: Joseph Smit · PhyloPic
In 3 days ~70% in a week ~90%
The California ground squirrel (Otospermophilus beecheyi), also known as the Beechey ground squirrel, is a common and easily observed ground squirrel of the western United States and the Baja California Peninsula. It is common in California with its range spanning through much of the state, as well as northeastern Nevada in areas around Reno and Lake Tahoe.
Formerly placed in Spermophilus, as Spermophilus beecheyi, it was reclassified in Otospermophilus in 2009, as it became clear that Spermophilus as previously defined was not a natural (monophyletic) group. John Richardson, who originally described the species as Arctomys (Spermophilus) beecheyi, or "Beechey's marmot", named it after Frederick William Beechey, an early 19th-century British explorer and naval officer. The squirrel's upper parts are mottled, with the fur containing a mixture of gray, light brown and dusky hairs. The shoulders, neck and sides are a lighter gray. The fur around the eyes is whitish. The underside is lighter, buff or grayish yellow. Head and body are about 30 cm (12 in) long and the tail an additional 15 centimetres (5.9 in). They can weigh from 280 to 738 g (9.9 to 26... Wikipedia →
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United States · 2019
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United States · 2025
© Nathan J Taylor · iNaturalist · CC BY-NC 4.0
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United States · 2026
© robertbogdon · iNaturalist · CC BY-NC 4.0
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Yosemite National Park | 🇺🇸 United States | |
| 2 | Sequoia and Kings Canyon National Parks | 🇺🇸 United States | |
| 3 | Joshua Tree National Park | 🇺🇸 United States | |
| 4 | Channel Islands National Park | 🇺🇸 United States | |
| 5 | El Vizcaíno Biosphere Reserve | 🇲🇽 Mexico |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Tijuana | 🇲🇽 México | |
| 2 | San Diego | 🇺🇸 United States | |
| 3 | San Francisco | 🇺🇸 United States | |
| 4 | Sacramento | 🇺🇸 United States | |
| 5 | Los Angeles | 🇺🇸 United States |
| # | Zoo / Centre | Country | |
|---|---|---|---|
| 1 | Sierra Safari Zoo | 🇺🇸 United States |
Possible
About 30% of wildlife watchers report a California Ground Squirrel sighting in San Francisco on a given day, based on 4,759 verified sightings from GBIF citizen-science data. It is the 2nd most-seen of the 38 mammals we can rate there. Over three days the chance rises to about 70%, and over a week to about 90%, if each day is a fresh chance.
Any time of year
In every month with enough records, about 30% of wildlife watchers report a California Ground Squirrel in San Francisco on a given day, so our monthly data shows no clear season.
Between 10 am and 1 pm
Across all the parks we cover, that three-hour window holds the most California Ground Squirrel sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
3rd of 5
Of the 5 cities where we can rate California Ground Squirrel sightings, San Francisco ranks 3rd at about 30%. The best odds are in Tijuana (México, about 60%) and San Diego (United States, about 40%).
Same family: Sciuridae
The closest relatives of the California Ground Squirrel that you can see in San Francisco (family Sciuridae, Squirrels) are Eastern Gray Squirrel (about 30%) and Fox Squirrel (about 30%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the California Ground Squirrel is recorded against all the mammals logged in San Francisco (4,759 verified sightings), calibrated against known sighting rates. Figures are rounded to the nearest 10% because citizen-science data supports honest approximations, not decimals, and months with records from fewer than five people show "—". How it works.
