Aspidoscelis tigris
Silhouette: Jose Carlos Arenas-Monroy · PhyloPic
In 3 days ~20% in a week ~30%
The western whiptail (Aspidoscelis tigris) is a species of lizard in the family Teiidae. The species is found throughout most of the southwestern United States and northern Mexico. Most of its populations appear stable, and it is not listed as endangered in any of the states comprising its range. It lives in a wide variety of habitats, including deserts and semiarid shrubland, usually in areas with sparse vegetation; it also may be found in woodland, open dry forest, and riparian growth. It lives in burrows. Major differences between this species and the checkered whiptail (Aspidoscelis tesselatus) include the lack of enlarged scales anterior to the gular fold and the presence of enlarged postantebrachial scales. It was previously known as Cnemidophorus tigris, until phylogenetic analyses concluded that the genus Cnemidophorus was polyphyletic. Since it does not migrate, a number of forms have developed in different regions, several of which have been given subspecific names – for example the California whiptail, Aspidoscelis tigris munda.
Including the nominotypical subspecies, 16 subspecies of Aspidoscelis tigris are recognized as being valid. A... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Joshua Tree National Park | 🇺🇸 United States | |
| 2 | Zion National Park | 🇺🇸 United States | |
| 3 | Death Valley National Park | 🇺🇸 United States | |
| 4 | Grand Canyon National Park | 🇺🇸 United States | |
| 5 | Saguaro National Park | 🇺🇸 United States | |
| 6 | El Vizcaíno Biosphere Reserve | 🇲🇽 Mexico | |
| 7 | Sequoia and Kings Canyon National Parks | 🇺🇸 United States | |
| 8 | Yosemite National Park | 🇺🇸 United States | |
| 9 | Bahía de Loreto National Park | 🇲🇽 Mexico |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Phoenix | 🇺🇸 United States | |
| 2 | Las Vegas | 🇺🇸 United States | |
| 3 | Mesa | 🇺🇸 United States | |
| 4 | Los Angeles | 🇺🇸 United States | |
| 5 | Sacramento | 🇺🇸 United States | |
| 6 | San Diego | 🇺🇸 United States | |
| 7 | Salt Lake City | 🇺🇸 United States |
With luck
About 10% of wildlife watchers report a Western Whiptail sighting in Sacramento on a given day, based on 28 verified sightings from GBIF citizen-science data. It is the 11th most-seen of the 14 reptiles we can rate there. Over three days the chance rises to about 20%, and over a week to about 30%, if each day is a fresh chance.
May to September
In those months about 10% of wildlife watchers report a Western Whiptail in Sacramento on a given day, against under 5% in October to April, the lowest months. Those are among Sacramento's driest months, with about 5 mm of rain a month against 120 mm in December.
Between 9 am and noon
Across all the parks we cover, that three-hour window holds the most Western Whiptail sightings with a recorded time, and nearly all of them come between 6 am and 6 pm: it is a daytime animal.
5th of 7
Of the 7 cities where we can rate Western Whiptail sightings, Sacramento ranks 5th at about 10%. The best odds are in Phoenix (United States, about 20%), Las Vegas (United States, about 20%) and Mesa (United States, about 20%).
GBIF citizen-science records
It is estimated from how often the Western Whiptail is recorded against all the reptiles logged in Sacramento (28 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.
