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Gilbert's Skink

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Gilbert's Skink
Missing image
Western_Red-tailed_Skink.jpg
Western Red-tailed Skink


Scientific classification
Kingdom:Animalia
Phylum:Chordata
Class:Reptilia
Order:Squamata
Suborder:Sauria
Family:Scincidae
Genus:Eumeces
Species:E. gilberti
Binomial name
Eumeces gilberti
Van Denburgh, 1896


Gilbert's Skink (Eumeces gilberti) is a heavy-bodied medium-sized lizard of the family of skinks living in the south-western United States. It grows to about 7 to 12 cm (2.75 to 4.75 inches) total length.

Taxonomy

Eumeces gilberti was first described by Van Denburgh in 1896. It was named in honor of Van Denburgh's teacher, Dr. Charles H. Gilbert (1859 - 1928), who at the time was a professor of zoology at Stanford University.

There are five subspecies of Eumeces gilberti:

  • Arizona Skink (E.g. arizonensis); Lowe and Shannon, 1954
  • Greater Brown Skink (E.g. gilberti); Van Denburgh, 1896
  • Northern Brown Skink (E.g. placerensis); Rodgers, 1944
  • Variegated Skink (E.g. cancellosus); Rodgers and Fitch, 1947
  • Western Red-tailed Skink (E.g. rubricaudatus); Taylor, 1935

(E.g. placerensis got its name from Placer County, California, where it occurs.)

Together with the Western Skink (E. skiltonianus), the San Lucan Skink (E. lagunensis), and the Four-lined Asiatic Skink (E. quadrilineatus), the Western Skink belongs to the so-called "skiltonianus group". The exact taxonomy within this group is being questioned and may need revision following DNA analysis research.

Range and Habitat

Gilbert's Skink occurs mainly in California. It is found in the northern San Joaquin Valley, in the foothills of the Sierra Nevada from Butte County southward, and along the inner flanks of the Coast Ranges from San Francisco Bay to the Mexican border and into northern Baja California. It is also found in the mountains of southern California, and at scattered mountain localities in the eastern desert from Mono County to San Bernadino County. Isolated populations also occur in western Arizona as well as in southern Nevada.

Gilbert's Skink occurs in habitat ranging from sea level to elevations of about 2200 m (7300 ft). Found in a wide variety of habitats, this lizard is commonest in early successional stages or open areas within habitats in which it occurs, which ranges from grassland to open chaparral or open pine forests. Heavy brush and densely forested areas are generally avoided.

Description

Missing image
Eumeces_Gilberti_Head.jpg


Gilbert's Skink is a heavy-bodied lizard with small legs. Adults are uniformly colored in green, grey, olive or brown. Juveniles have light stripes on the sides and the back enclosing a broad black or brown stripe. This dark stripe stops near base of a waxy-pink tail. The striping fades with growth and maturation.

This robust skink is seldom seen in the open. It forages through leaf litter and dense vegetation, occasionally digging through loose soil. It is a good burrower and often constructs its own shelter by burrowing under surface objects such as rocks or rotting logs. Females construct nest chambers in loose moist soil several centimeters deep, especially under flat stones.

The reproductive season for this species varies geographically and from year to year depending on local conditions. Little is known about the timing of reproduction, but it is probably similar to the Western Skink. Clutch size varies from 3 to 9 eggs.

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