Crotaphytus collaris
Silhouette: Jose Carlos Arenas-Monroy · PhyloPic
In 3 days ~30% in a week ~60%
The common collared lizard (Crotaphytus collaris), also commonly called eastern collared lizard, Oklahoma collared lizard, mountain boomer, yellow-headed collared lizard, and collared lizard, is a North American species of lizard in the family Crotaphytidae. The common name "collared lizard" comes from the lizard's distinct coloration, which includes bands of black around the neck and shoulders that look like a collar. Males can be very colorful, with blue-green bodies, yellow stripes on the tail and back, and yellow-orange throats. Five subspecies are recognized.
The subspecific name, baileyi, is in honor of American mammalogist Vernon Orlando Bailey. The five subspecies recognized as being valid, including the nominotypical subspecies, are: Crotaphytus collaris auriceps Fitch & W. Tanner, 1951 – yellow-headed collared lizard
C. collaris fuscus W. Ingram & W. Tanner, 1971 – Chihuahuan collared lizard Nota bene: A trinomial authority in parentheses indicates that the subspecies... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Big Bend National Park | 🇺🇸 United States | |
| 2 | Guadalupe Mountains National Park | 🇺🇸 United States | |
| 3 | Saguaro National Park | 🇺🇸 United States | |
| 4 | Grand Canyon National Park | 🇺🇸 United States | |
| 5 | Cumbres de Monterrey National Park | 🇲🇽 Mexico |
With luck
About 10% of wildlife watchers report an Eastern Collared Lizard sighting in Saguaro National Park on a given day, based on 47 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 22nd most-seen of the 51 reptiles we can rate there. Over three days the chance rises to about 30%, and over a week to about 60%, if each day is a fresh chance.
April
In that month about 20% of wildlife watchers report an Eastern Collared Lizard in Saguaro National Park on a given day, against under 5% in December and January, the lowest months. That is one of Saguaro National Park's driest months, with about 5 mm of rain against 55 mm in July.
Between 10 am and 1 pm
Across all the parks we cover, that three-hour window holds the most Eastern Collared Lizard 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 parks where we can rate Eastern Collared Lizard sightings, Saguaro National Park ranks 3rd at about 10%. The best odds are in Big Bend National Park (United States, about 20%) and Guadalupe Mountains National Park (United States, about 20%).
GBIF citizen-science records
It is estimated from how often the Eastern Collared Lizard is recorded against all the reptiles logged in Saguaro National Park (47 verified sightings from 2019 to 2026), 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.
