Island Night Lizards: San Clemente Island

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Island Night Lizard (Xantusia riversiana), endemic to the California Channel Islands where it is found only on Santa Barbara Island and adjacent Sutil Rock, and on San Nicolas and San Clemente islands — islands lacking snakes. Undisturbed rocks and vegetative cover are important in providing shelter and refuge for this species. Individuals may live into their teens. Females do not mature sexually until their third or fourth year, and they reproduce only every other year. Island night lizards are larger than their cousin species of desert night lizards. About 30% of their diet consists of vegetable material. The San Clemente Island population is considered a recognized subspecies (ssp. reticulata). Recent research indicates that Island night lizards have a very limited home range, and travel no more than 50 feet over a one-year period. Island Night Lizards are considered a threatened species.



Island Collections~
ISLAND COLLECTOR INSTITUTION DATE NUMBER SPECIMEN
San Clemente Island J. G. Cooper NMNH July 1861 USNM-16321 Xantusia riversiana Herps
San Clemente Island J. S. Dixon MVZ April 17, 1920 MVZ-7355 Xantusia riversiana Herps
San Clemente Island J. S. Dixon MVZ April 17, 1920 MVZ-7356 Xantusia riversiana Herps
San Clemente Island J. S. Dixon MVZ April 17, 1920 MVZ-7357 Xantusia riversiana Herps
San Clemente Island J. S. Dixon MVZ April 19, 1920 MVZ-7358 Xantusia riversiana Herps
San Clemente Island J. S. Dixon MVZ April 19, 1920 MVZ-7359 Xantusia riversiana Herps
San Clemente Island Theodore Reddick SDNHM April 30, 1939 SDNHM-31372 Xantusia riversiana Herps
San Clemente Island Theodore Reddick SDNHM April 30, 1939 SDNHM-31373 Xantusia riversiana Herps
San Clemente Island Theodore Reddick SDNHM April 30, 1939 SDNHM-31374 Xantusia riversiana Herps
San Clemente Island Theodore Reddick SDNHM May 14, 1939 SDNHM-31472 Xantusia riversiana Herps
San Clemente Island Theodore Reddick SDNHM May 15, 1939 SDNHM-31477 Xantusia riversiana Herps
San Clemente Island Theodore Reddick SDNHM May 15, 1939 SDNHM-31478 Xantusia riversiana Herps
San Clemente Island Sam Hinton FMNH January 5, 1947 FMNH-48537 Xantusia riversiana Herps
San Clemente Island Sam Hinton FMNH January 5, 1947 FMNH-48538 Xantusia riversiana Herps
San Clemente Island Sam Hinton FMNH January 5, 1947 FMNH-48539 Xantusia riversiana Herps
San Clemente Island Sam Hinton FMNH January 5, 1947 FMNH-48540 Xantusia riversiana Herps
San Clemente Island Sam Hinton FMNH February 18, 1947 FMNH-48534 Xantusia riversiana Herps
San Clemente Island Sam Hinton FMNH February 18, 1947 FMNH-48535 (exchanged) Xantusia riversiana Herps
San Clemente Island Sam Hinton FMNH February 18, 1947 FMNH-48536 Xantusia riversiana Herps
San Clemente Island Sam Hinton FMNH February 18, 1947 FMNH-48573 Xantusia riversiana Herps
San Clemente Island J. R. Hendrickson RMB February 23, 1949 RMB-3609 Xantusia riversiana Herps
San Clemente Island C. F. Coil July 13, 1950 RMB-3607 Xantusia riversiana Herps
San Clemente Island C. F. Coil July 14, 1950 RMB-3608 Xantusia riversiana Herps
San Clemente Island C. L. Remington YPM 1970 YPM-016575 Klauberina riversiana Herps
San Clemente Island C. L. Remington YPM 1970 YPM-016576 Klauberina riversiana Herps
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