Elgaria multicarinata

The range of this species is primarily west of the Cascade-Sierra Nevada crest in the western United States from south-central Washington and north-central Oregon (mainly west of Cascade crest) south through western Oregon and California to northern Baja California in Mexico, including islands off southern California and northern Baja California (though not on the Coronados Islands where Elgaria nana occurs) (Stebbins 2003). Isolated populations exist east of the Sierra Nevada at Grant Lake, Mono County, California; Alabama Hills and Walker Pass, Kern County, California; Walker Creek near Olancha, Inyo County, California, and along the Mojave River, California; there is also an isolated occurrence at Sierra La Asamblea, Baja California (Stebbins 2003). The species was introduced at Las Vegas, Nevada (Stebbins 2003). Unconfirmed sight record at Boulder Beach Campground, Clark County, Nevada (Stebbins 2003). DNA data suggest that the population on San Nicolas Island, California, may have been recently transported there (Mahoney et al. 2003). Elevational range is from sea level to around 5,000 feet (1,524 m asl) (Stebbins 2003).

occurs (regularly, as a native taxon) in multiple nations

United States

Origin: Native

Regularity: Regularly occurring

Currently: Present

Confidence: Confident

Type of Residency: Year-round

Global Range: (20,000-2,500,000 square km (about 8000-1,000,000 square miles)) The range is primarily west of the Cascade-Sierra Nevada crest from south-central Washington and north-central Oregon (mainly west of Cascade crest) south through western Oregon and California to northern Baja California, including islands off southern California and northern Baja California (Stebbins 2003). Isolated populations exist east of the Sierra Nevada at Grant Lake, Mono County, California; Alabama Hills and Walker Pass, Kern County, California; Walker Creek near Olancha, Inyo County, California, and along the Mojave River, California; there is also an isolated occurrence at Sierra La Asamblea, Baja California Sur (Stebbins 2003). The species was introduced at Las Vegas, Nevada (Stebbins 2003). Unconfirmed sight record at Boulder Beach Campground, Clark County, Nevada (Stebbins 2003). DNA data suggest that the population on San Nicolas Island, California, may have been recently transported there (Mahoney et al. 2003). Elevational range is from sea level to around 5,000 feet (1,524 meters) (Stebbins 2003).

Continent: Middle-America North-America
Distribution: USA (Washington, Oregon, California),  Mexico (Baja California)  ignava: San Martin Island, Baja California  nana: Los Coronados Island, Baja California.
Type locality: South island, Los Coronados Island, Baja California.  webbii: S California, N Baja California.
Type locality: “San Diego to El Paso”. Restrcited to San Diego, California, by SMITH & TAYLOR 1950.

Length: 43 cm

Habitat and Ecology

Systems

• Terrestrial

Comments: Habitats are diverse and include grassland, chaparral, oak woodland, and open pine forest; in drier regions, the species most often occurs along streams or in other moist, vegetated areas (Stebbins 2003). Microhabitats include logs, thickets, rocks, and old woodpiles and trash heaps around houses (Stebbins 2003). This is a basically terrestrial lizard that sometimes climbs bushes and trees. Egg-laying sites include burrows or stable talus (Nussbaum et al. 1983).

Non-Migrant: Yes. At least some populations of this species do not make significant seasonal migrations. Juvenile dispersal is not considered a migration.

Locally Migrant: No. No populations of this species make local extended movements (generally less than 200 km) at particular times of the year (e.g., to breeding or wintering grounds, to hibernation sites).

Locally Migrant: No. No populations of this species make annual migrations of over 200 km.

Comments: Eats a wide variety of invertebrates including: slugs, insects, centipedes, scorpions, and spiders. Also eats small vertebrates: lizards, small mammals, and occasionally eggs and young of birds (Stebbins 1985).

Note: For many non-migratory species, occurrences are roughly equivalent to populations.

Estimated Number of Occurrences: > 300

Comments: Known from hundreds of locations. Nussbaum et al. (1983) mapped about 90 localities in Washington and Oregon, and Lais (1976) mapped hundreds of collection sites throughout much of California.

100,000 to >1,000,000 individuals

Comments: Total adult population size is unknown but surely exceeds 100,000.

Sometimes enters water to escape predators. Eurythermic during activity (J. Herpetol. 27:241-247).

Comments: Inactive during the coldest weather, but active over a wide range of temperatures (body temperatures of about 9-34 C) (Kingsbury, 1994, Herpetologica 50:266-273). Primarily diurnal, except during warmer parts of the year when it may be partly nocturnal (Stebbins 1985).

Maximum longevity: 9.8 years (captivity)

Lays 1-3 clutches May-July (Stebbins 1985). Clutch size varies with the size of the female but usually is 5-20. Hatchlings emerge around September or October (Nussbaum et al. 1983).

Year Assessed

Assessor/s

Reviewer/s

Justification

United States

Rounded National Status Rank: N5 - Secure

Rounded Global Status Rank: G5 - Secure

Intrinsic Vulnerability: Moderately vulnerable

Population

Population Trend

Global Short Term Trend: Relatively stable (=10% change)

Comments: The trend in extent of occurrence, area of occupancy, and abundance is likely relatively stable, with localized declines not posing a threat to the species.

Global Long Term Trend: Increase of 10-25% to decline of 30%

Degree of Threat: Medium

Comments: Commercial and residential development have caused localized declines, but many populations exist in remote areas, and the species is tolerant of a modest amount of habitat alteration.

Major Threats

Conservation Actions

Global Protection: Very many (>40) occurrences appropriately protected and managed