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| California alligator lizard | |
|---|---|
| Name | California alligator lizard |
| Genus | Elgaria |
| Species | multicarinata |
| Authority | (Blainville, 1835) |
California alligator lizard The California alligator lizard is a medium-sized, keeled-scaled squamate native to western North America, noted for its elongated body and prehensile tail. It occupies a range of habitats across coastal and montane regions and figures in the natural histories of California, Oregon, and Baja California as a frequently observed insectivorous predator. Its taxonomic history intersects with 19th-century herpetology, museum collections, and regional faunal surveys led by institutions such as the California Academy of Sciences and the National Museum of Natural History.
Described by Henri Marie Ducrotay de Blainville in 1835, the species is placed in the genus Elgaria within the family Anguidae, which also includes other North American alligator lizards and slowworms discussed by researchers from the American Museum of Natural History and the Smithsonian Institution. Taxonomic treatments have been influenced by molecular phylogenetics from laboratories at Harvard University, University of California, Berkeley, and the University of Washington, with recent revisions referencing type specimens in collections at the Natural History Museum, London and the Los Angeles County Museum of Natural History. Common names have appeared in field guides published by Peterson Field Guides, the Audubon Society, and regional checklists produced by the California Department of Fish and Wildlife.
Adults typically reach total lengths recorded in surveys by Scripps Institution of Oceanography collaborators and naturalists such as Joseph Grinnell, exhibiting dorsoventrally flattened bodies with prominent dorsal keels and a laterally compressed tail. Coloration ranges from brown to gray with dark crossbands, noted in plates from the Smithsonian Institution Libraries and the University of California Press monographs. Limb morphology, scale counts, and cranial osteology have been compared with related taxa in studies from Stanford University and Yale University, and diagnostic characters are detailed in keys used by field biologists at the National Audubon Society and the California Academy of Sciences.
The species' distribution includes coastal ranges and interior valleys documented in surveys by the United States Geological Survey, with populations recorded from the Oregon Coast Range through the Sierra Nevada foothills to Baja California Norte. Habitat associations span oak woodland and chaparral mapped by the California Native Plant Society, riparian corridors monitored by The Nature Conservancy, and anthropogenic landscapes evaluated in studies by University of California, Davis and California State Parks. Elevational limits reported in county inventories from Los Angeles County, San Diego County, and Santa Cruz County correspond to microhabitat use of rock crevices, leaf litter, and logs noted in regional field guides from the National Geographic Society.
Behavioral observations recorded by researchers affiliated with Stanford University and the University of California, Santa Barbara show crepuscular and diurnal activity patterns influenced by thermal regimes described in work from Scripps Institution of Oceanography and NASA climate datasets. Territoriality, substrate use, and escape behaviors are reported in ecological studies published by the Ecological Society of America and natural history notes in publications of the California Herpetological Society. Interactions with sympatric species such as the Western fence lizard, San Diego horned lizard, and various snake species have been included in community ecology assessments by the American Society of Ichthyologists and Herpetologists.
Dietary studies using stomach content analysis in museum specimens at the American Museum of Natural History and the Museum of Vertebrate Zoology indicate a predominance of arthropods, including beetles and spiders cataloged in entomological collections at the Smithsonian Institution and the California Academy of Sciences. Predators include raptors documented by the National Audubon Society, mammalian carnivores surveyed by the California Department of Fish and Wildlife, and snakes noted in field reports from the University of California, Berkeley. Foraging strategies and prey selection have been compared in comparative studies by researchers at Cornell University and Oregon State University.
Reproductive biology has been described in life-history studies published in journals overseen by the Society for the Study of Amphibians and Reptiles and researchers at the University of California, Los Angeles. The species is viviparous, with mating seasons and gestation periods recorded by fieldworkers from the California Fish and Game reports and museum naturalists at the Museum of Vertebrate Zoology. Juvenile development, growth rates, and age structure have been included in long-term monitoring programs run by the California Department of Parks and Recreation and academic studies from the University of California, Riverside.
Conservation status assessments referenced by the International Union for Conservation of Nature and state-level evaluations from the California Natural Diversity Database highlight habitat loss from urbanization mapped by U.S. Census Bureau expansion data and fragmentation analyses by the NatureServe network. Threats also include invasive species documented by the California Invasive Plant Council and wildfire regime changes studied by the United States Forest Service and climate researchers at NASA and NOAA. Conservation actions promoted by NGOs such as Defenders of Wildlife, The Nature Conservancy, and state agencies including the California Department of Fish and Wildlife emphasize habitat protection, monitoring in reserves like those managed by the National Park Service, and inclusion in regional biodiversity planning led by the California Biodiversity Initiative.
Category:Elgaria Category:Fauna of California