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Common Side-blotched Lizard (Uta stansburiana)
Lizards Around Las Vegas, Wildlife Around Las Vegas
Side-blotched Lizard (Uta stansburiana)
Notice the dark "side blotch"

Taxonomy: Phrynosomatid Lizard Family.

General Description: Common Side-blotched Lizards (Uta stansburiana) are the most common small lizards in desert areas around Las Vegas. Males and females look different, and they are highly variable among one another and especially during the breeding season, but they all have a black spot, the "side blotch," on the side of the body just behind the front legs.

Common Side-blotched Lizard (Uta stansburiana)
Dorsal scales small, smooth, and more-or-less uniform in size

Technical Description: Small (snout-vent length about 5.5 cm [2.25 in.]). The body color generally is brown with a small, but conspicuous, dark spot on the sides of the body just behind the front legs. There are a variety of dorsal patterns: blotched, speckled, and unpatterned. Males tend to be unpatterned, but speckled with blue during the breeding season. Females tend to have a row of dark blotches along each side of the back that converge in the middle of the back, also one row of blotches down the top of the tail. The belly color is gray (no blue). A narrow white stripe extends from the outside corner of each eye onto the shoulder. Scales on the back small and smooth, without keels or spines, and the gular fold is complete. Males have a swollen tail base and enlarged postanal scales.

Common Side-blotched Lizard (Uta stansburiana)
Arrow indicates complete gular fold. Note lack of blue on chest; yellow stripes on face of breeding male.

Diet: Insects, spiders, and other small bugs.

Habitat: This is the most common lizard in the southwest. They are found from the low deserts into the lower mountains, but generally are most common at middle elevations. They can be found on rocks, the lower branches of trees and shrubs, and in debris near the ground.

Range: Most of the western United States and northern Mexico.

Comments: These lizards lay eggs during spring and summer, with as many as seven clutches of eight eggs each. Young lizards are seen in late summer and fall.

Common Side-blotched Lizard (Uta stansburiana)
Male Side-blotched Lizard, non-breeding colors: note dark side blotch
Side-blotched Lizard (Uta stansburiana)
Side-blotched Lizard: especially in females, the blotch may be faint
Common Side-blotched Lizard (Uta stansburiana)
Side-blotched Lizard: dark male with shorter tail
Side-blotched Lizard (Uta stansburiana)
Side-blotched Lizard: dark male with very long tail
Side-blotched Lizard (Uta stansburiana)
Side-blotched Lizard: pale male with yellow-orange highlights
Common Side-blotched Lizard (Uta stansburiana)
Male Side-blotched Lizard in the bottom of Death Valley
Common Side-blotched Lizard (Uta stansburiana)
Male Side-blotched Lizard in non-breeding colors
Side-blotched Lizard (Uta stansburiana)
Male Side-blotched Lizard in breeding colors
Common Side-blotched Lizard (Uta stansburiana)
Wickenburg, Arizona
Common Side-blotched Lizard (Uta stansburiana)
Tucson, Arizona
Common Side-blotched Lizard (Uta stansburiana)
Unusually red lizard from SE Utah
Side-blotched Lizard (Uta stansburiana)
Breeding male; Joshua Tree NP
Side-blotched Lizard (Uta stansburiana)
Side-blotched Lizard adult female (LA Basin, Southern California)
Common Side-blotched Lizard (Uta stansburiana)
Female: notice indistinct longitudinal stripes and bars on the tail
Side-blotched Lizard (Uta stansburiana)
Female: notice indistinct longitudinal stripes and bars on the tail
Side-blotched Lizard (Uta stansburiana)
Pale female (LA Basin, Southern California)
Common Side-blotched Lizard (Uta stansburiana)
Side-blotched Lizard adult male in breeding color
Common Side-blotched Lizard (Uta stansburiana)
Side-blotched Lizard adult male in breeding color (Gold Butte, NV)
Common Side-blotched Lizard (Uta stansburiana)
Side-blotched Lizard adult male in breeding color
Common Side-blotched Lizard (Uta stansburiana)
Unusually red lizard from SE Utah
Common Side-blotched Lizard (Uta stansburiana)
Wickenburg, Arizona
Common Side-blotched Lizard (Uta stansburiana)
Side-blotched Lizard adult male
Common Side-blotched Lizard (Uta stansburiana)
Tucson, Arizona
Side-blotched Lizard (Uta stansburiana)
Uta on Desert Holly leaves in the bottom of Death Valley
Side-blotched Lizard (Uta stansburiana)
Side-blotched Lizard adult female
Side-blotched Lizard (Uta stansburiana)
Side-blotched Lizard adult female
Common Side-blotched Lizard (Uta stansburiana)
Side-blotched Lizard adult female
Common Side-blotched Lizard (Uta stansburiana)
Leadfield, Death Valley, California
Common Side-blotched Lizard (Uta stansburiana)
Young Side-blotched Lizard
Common Side-blotched Lizard (Uta stansburiana)
Young Side-blotched Lizard
Common Side-blotched Lizard (Uta stansburiana)
Young Side-blotched Lizard
Common Side-blotched Lizard (Uta stansburiana)
Young Side-blotched Lizard
Common Side-blotched Lizard (Uta stansburiana)
Very young Side-blotched Lizard: already lost its tail
Common Side-blotched Lizard (Uta stansburiana)
Very young Side-blotched Lizard: already lost its tail
Common Side-blotched Lizard (Uta stansburiana)
Adult male Side-blotched Lizard in breeding color (zoom)
Common Side-blotched Lizard (Uta stansburiana)
Dorsal scales more-or-less uniform in size (breeding female)
Common Side-blotched Lizard (Uta stansburiana)
Common Side-blotched Lizard with breeding colors
Side-blotched Lizard (Uta stansburiana)
Female: no enlarged postanal scales
Common Side-blotched Lizard (Uta stansburiana)
Female Common Side-blotched Lizard
Side-blotched Lizard (Uta stansburiana)
White stripe from eye to shoulder; complete gular fold
Side-blotched Lizard (Uta stansburiana)
Large scales on head
Side-blotched Lizard (Uta stansburiana)
Pale lizard with yellow-orange highlights; Floor of Death Valley
Common Side-blotched Lizard (Uta stansburiana)
1. Pattern variation: normal breeding female
Common Side-blotched Lizard (Uta stansburiana)
2. Pattern variation: focus only on the darkest blotches
Common Side-blotched Lizard (Uta stansburiana)
3. Pattern variation: erase the remaining back pattern
Common Side-blotched Lizard (Uta stansburiana)
4. Pattern variation: unusual pattern on female side-blotched lizard
Side-blotched Lizard (Uta stansburiana)
1. Male in full breeding condition
Side-blotched Lizard (Uta stansburiana)
2. Male in full breeding condition interacting with female
Side-blotched Lizard (Uta stansburiana)
3. Male in full breeding condition, but female runs off
Side-blotched Lizard (Uta stansburiana)
4. Female off by herself
Common Side-blotched Lizard (Uta stansburiana)
Common Side-blotched Lizard tracks in soft sand
more to come
More to come ...

Note: All distances, elevations, and other facts are approximate.
copyright; Last updated 220913

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