{"elementGlobalId":103364,"circumscripConfidence":{"id":1,"circumscripConfidenceDescEn":"1 - Strong","circumscripConfidenceDescEs":"1 - Fuerte","circumscripConfidenceDescFr":"1 – Forte"},"classificationLevel":{"id":7,"classificationLevelNameEn":"Species","classificationLevelNameEs":"Especies","classificationLevelNameFr":"Espèce"},"classificationStatus":{"id":1,"classificationStatusDescEn":"Standard","classificationStatusDescEs":"Estándar","classificationStatusDescFr":"Standard"},"iucn":{"id":11,"iucnDescEn":"Least concern","iucnDescEs":"Menos preocupante","iucnDescFr":"Moins préoccupante","iucnCode":"LC"},"nameCategory":{"id":1,"nameCategoryDescEn":"Vertebrate Animal","nameCategoryDescEs":"Animal vertebrado","nameCategoryDescFr":"Animal vertébré","nameTypeCd":"A","nameTypeDesc":"Zoological"},"rankMethodUsed":null,"formattedScientificName":"<i>Crotaphytus vestigium</i>","scientificName":"Crotaphytus vestigium","scientificNameAuthor":"Smith and Tanner, 1972","primaryCommonName":"Baja California Collared Lizard","relatedItisNames":"<i>Crotaphytus vestigium</i> Smith and Tanner, 1972 (TSN 564569)","uniqueId":"ELEMENT_GLOBAL.2.103364","elcode":"ARACF04030","conceptRefFullCitation":"McGuire, J. A. 1996. Phylogenetic systematics of crotaphytid lizards (Reptilia: Iguania: Crotaphytidae). Bulletin of Carnegie Museum of Natural History (32):1-143.","conceptName":"<i>Crotaphytus vestigium</i>","taxonomicComments":"A phylogenetic analysis by McGuire (1996) concluded that <i>C. bicinctores</i>, <i>C. insularis</i> (confined to Isla Angel de la Guarda, Mexico), and <i>C. vestigium</i> are distinct species; previously they had been regarded as conspecific in various combinations by some authors.<br/><br/><i>Crotaphytus fasciolatus </i>Mocquard, 1903 is a senior synonym of <i>C. vestigium</i> Smith and Tanner 1972 but, because Mocquard's name has not been used for these lizards for several decades and has been regarded as a junior synonym of <i>Gambelia wislizenii</i>, the name <i>Crotaphytus fasciolatus </i>should be suppressed in order to maintain nomenclatural stability (McGuire 1996). McGuire (2000) formally proposed conservation of the name <i>C. vestigium</i>. Savage opposed this petition while Etheridge supported it (Bull. Zool. Nomen., 58:59-60, 2001). ICZN (2002) conserved the name <i>C. vestigium</i> and suppressed the name <i>C. fasciolatus</i>.","roundedGRank":"G5","conservationStatusFactorsEditionDate":"2005-05-13","conservationStatusFactorsEditionAuthors":"Hammerson, G.","primaryCommonNameLanguage":"EN","recordType":"SPECIES","elementNationals":[{"elementNationalId":168823,"classifConfidence":null,"nation":{"id":225,"nameEn":"United States","nameEs":"Estados Unidos","nameFr":"États-Unis","isoCode":"US","region":"United States"},"roundedNRank":"N5","elementSubnationals":[{"elementSubnationalId":315793,"subnation":{"id":7,"nameEn":"California","nameEs":"California","nameFr":"Californie","subnationCode":"CA","dnationId":225},"roundedSRank":"SNR","dataSensitive":{"id":2,"dataSensitiveDescEn":"No","dataSensitiveDescEs":null,"dataSensitiveDescFr":null,"dataSensitiveCode":"N"},"dataSensitiveCategory":null,"srank":"SNR","speciesSubnational":{"elementSubnationalId":315793,"hybrid":false,"exotic":false,"native":true}}],"nrankReviewYear":2001,"nrank":"N5","speciesNational":{"elementNationalId":168823,"exotic":false,"native":true}}],"lastModified":"2026-10-02T21:41:32.128135Z","lastPublished":"2026-10-02T21:32:08.892226Z","promotionalDescription":null,"conceptLineageSummary":null,"nsxUrl":"/Taxon/ELEMENT_GLOBAL.2.103364/Crotaphytus_vestigium","grankAdjustmentReasons":null,"grankChangeDate":"1996-10-28","grankReviewDate":"2005-05-13","grankReasons":null,"grank":"G5","rankInfo":{"elementGlobalId":103364,"aooPercentGood":null,"enviromentalSpecificity":null,"intrinsicVulnerability":{"id":4,"intrinsicVulnerabilityDescEn":"Moderately vulnerable","intrinsicVulnerabilityDescEs":"Moderadamente vulnerable","intrinsicVulnerabilityDescFr":"Moyennement vulnérable"},"longTermTrend":{"id":38,"longTermTrendDescEn":"Decline of <30% to increase of 25%","longTermTrendDescEs":"Disminución de <30% a aumento de 25%.","longTermTrendDescFr":"Diminution de <30 % à augmentation de 25 %"},"numberEos":{"id":13,"numberEosDescEn":"81 - 300","numberEosDescEs":"De 81 a 300","numberEosDescFr":"De 81 à 300"},"numberGoodEos":{"id":19,"numberGoodEosDescEn":"Many (41-125)","numberGoodEosDescEs":"Muchos (41-125)","numberGoodEosDescFr":"Plusieurs (de 41 à 125)"},"numberProtEos":null,"popSize":{"id":32,"popSizeDescEn":"10,000 - 1,000,000 individuals","popSizeDescEs":"De 10.000 a 1.000.000 de individuos","popSizeDescFr":"De 10 000 à 1 000 000 individus"},"rangeExtent":{"id":30,"rangeExtentDescEn":"20,000-200,000 square km (about 8000-80,000 square miles)","rangeExtentDescEs":"De 20.000 a 200.000 kilómetros cuadrados (aproximadamente 8.000 a 80.000.000 millas cuadradas)","rangeExtentDescFr":"De 20 000 à 200 000 km carrés (de 8 000 à 80 000 000 miles carrés approximativement)"},"shortTermTrend":{"id":40,"shortTermTrendDescEn":"Relatively Stable (<=10% change)","shortTermTrendDescEs":"Relativamente estable (variación = <10%)","shortTermTrendDescFr":"Relativement stable (variation = <10 %)"},"threatImpactAssigned":{"id":10,"threatImpactAssignedDescEn":"Low","threatImpactAssignedDescEs":"Bajo","threatImpactAssignedDescFr":"Faible"},"rangeExtentComments":"Range encompasses the desert side of the Peninsular Ranges of southern California, north to the northern slope of the San Jacinto Mountains near Palm Springs, and much of Baja California, southward to the southern margin of the volcanic Magdalena Plain (McGuire 1996, Grismer 2002, Stebbins 2003). In Baja California, the range includes Tecate Peak near the U.S.-Mexican border, and the western foothills of the Peninsular Ranges, and areas near El Rosario, but the species is absent from most of the western margin of the Baja Peninsula (Grismer 2002). Elevational range extends from near sea level to around 4,000 feet (1,094 meters) (Stebbins 2003).","areaOfOccupancy":null,"areaOfOccupancyComments":null,"numberEosComments":"McGuire (1996) mapped about 85 collection localities.","popSizeComments":"Total adult population size is unknown but certainly exceeds 10,000.","viabilityComments":null,"threatImpactComments":"No major threats have been identified.","shortTermTrendComments":"Extent of occurrence, area of occupancy, and abundance probaby are relatively stable.","longTermTrendComments":null,"inventoryNeeds":null,"numberProtEosComments":null,"protectionNeeds":null,"otherConsiderations":null,"intrinsicVulnerabilityComments":null,"enviromentalSpecificityComments":null},"animalCharacteristics":{"elementGlobalId":103364,"majorHabitat":{"id":3,"majorHabitatDescEn":"Terrestrial","majorHabitatDescEs":"Terrestre","majorHabitatDescFr":"Terrestre"},"nonMigrant":true,"localMigrant":false,"longDistanceMigrant":false,"mobilityMigrationComments":null,"foodHabitsComments":"Eats arthropods, small lizards, and sometimes plant material.","animalPhenologyComments":"Seasonal activity begins in March-April.","colonialBreeder":false,"length":null,"width":null,"weight":null,"animalPhenologies":[{"animalCagPhenologyId":102405,"animalPhenology":{"id":3,"animalPhenologyDescEn":"Diurnal","animalPhenologyDescEs":"Diurno","animalPhenologyDescFr":"Diurne","displayOrder":3},"adult":true,"immature":true}],"animalFoodHabits":[{"animalCagFoodHabitsId":104472,"foodHabits":{"id":1,"foodHabitsDescEn":"Carnivore","foodHabitsDescEs":"Carnívoro","foodHabitsDescFr":"Carnivore","displayOrder":1},"adult":true,"immature":true},{"animalCagFoodHabitsId":104473,"foodHabits":{"id":3,"foodHabitsDescEn":"Invertivore","foodHabitsDescEs":"Invertívoro","foodHabitsDescFr":"Invertivore","displayOrder":3},"adult":true,"immature":true}]},"occurrenceDelineations":[{"eoSpecsDetailId":1057,"locationUseClass":{"id":1,"locationUseClassDescEn":"Not applicable","locationUseClassDescEs":"No se aplica","locationUseClassDescFr":"Sans objet","displayOrder":1},"eoSpecGroupName":"Crotaphytid Lizards","subtypes":null,"inferredExtentDistance":0.2,"inferredExtentNotes":null,"minimumEoCriteria":"Occurrences are based on evidence of historical presence, or current and likely recurring presence, at a given location. Such evidence minimally includes collection or reliable observation and documentation of one or more individuals (including eggs) in or near appropriate habitat where the species is presumed to be established and  breeding.","mappingGuidance":null,"separationBarriers":"Busy highway or highway with obstructions such that lizards rarely if ever cross successfully; major river, lake, pond, or deep marsh; urbanized area dominated by buildings and pavement.","separationDistanceUnsuitableHabitatat":1.0,"separationDistanceSuitableHabitatat":5.0,"altSeparationProcedure":null,"separationJustification":"Crotaphytids tend to have small home ranges. Dispersal characteristics are unknown, but these lizards appear to be capable of making extensive movements. The separation distance for suitable habitat is a compromise between the documented sedentary habits and the likely low probability that two locations separated by less than several kilometers of suitable habitat would represent different populations.<br><br>Home range size of Gambelia sila is usually less than 9 ha (average 2 ha in females and 4.2 ha in males) (Warrick et al. 1998). For Gambelia wislizenii, Tanner and Krogh (1974) recorded home range sizes of 0.67, 1.54, and 2.35 ha over periods of 2-3 years for three individuals in Nevada. Some individuals appear to be somewhat nomadic. In northern Utah, Parker and Pianka (1976) recorded long distance movements by juvenile males (up to 806 m over two weeks and 1,186 m over 20 months) whereas adult males moved 0-450 m (average 125 m) over periods of about 2-4 weeks. In Kansas, male Crotaphytus collaris maintained home ranges averaging about 0.4 ha and spent most of their time in just a small portion of this. In Oklahoma, average home range size of adult male C. collaris was 1,865 sq m (Stone and Baird 2002).","versionDate":"2004-09-21","versionAuthor":"Hammerson, G.","versionNotes":null,"lastModified":"2020-04-30T02:06:17.146034Z"}],"plantCharacteristics":null,"elementManagement":{"elementGlobalId":103364,"eoManagementGroupName":null,"stewardshipOverview":null,"impacts":null,"restorationPotential":null,"siteConservationPlansConsidered":null,"managementMethods":null,"monitoringMethods":null,"managementProgramContacts":null,"monitoringProgramContacts":null,"managementResearchPrograms":null,"managementResearchNeeds":null,"biologicalResearchNeeds":null,"additionalTopics":null},"occurrenceViabilities":[{"eoRankSpecsDetailId":104848,"eoRankSpecsGroupName":null,"locationUseClass":{"id":1,"locationUseClassDescEn":"Not applicable","locationUseClassDescEs":"No se aplica","locationUseClassDescFr":"Sans objet","displayOrder":1},"excellentViability":null,"goodViability":null,"fairViability":null,"poorViability":null,"viabilityJustification":"Use the Generic Guidelines for the Application of Occurrence Ranks (2008).<br>The Key for Ranking Species Occurrences Using the Generic Approach provides a step-wise process for implementing this method.","versionDate":null,"versionAuthor":null,"versionNotes":null,"lastModified":"2020-05-14T02:23:54.241847Z"}],"references":[{"id":137372,"citation":"Behler, J. L., and F. W. King. 1979. The Audubon Society field guide to North American reptiles and amphibians. Alfred A. Knopf, New York. 719 pp.","shortCitationAuthor":"Behler and King","shortCitationYear":1979,"referenceCode":"B79BEH01NAUS","lastModified":"2020-02-25T14:38:24.173666Z"},{"id":122357,"citation":"Collins, J. T. 1991. Viewpoint: a new taxonomic arrangement for some North American amphibians and reptiles. SSAR Herpetol. Review 22:42-43.","shortCitationAuthor":"Collins","shortCitationYear":1991,"referenceCode":"A91COL01NAUS","lastModified":"2020-02-25T18:11:56.631788Z"},{"id":621810,"citation":"Crother, B. I. (editor). 2008. Scientific and standard English names of amphibians and reptiles of North America north of Mexico, with comments regarding confidence in our understanding. Sixth edition. Society for the Study of Amphibians and Reptiles Herpetological Circular 37:1-84. Online with updates at: http://www.ssarherps.org/pages/comm_names/Index.php","shortCitationAuthor":"Crother","shortCitationYear":2008,"referenceCode":"B08CRO01NAUS","lastModified":"2020-02-25T14:38:20.142383Z"},{"id":722484,"citation":"Crother, B. I. (editor). 2012. Scientific and standard English names of amphibians and reptiles of North America north of Mexico, with comments regarding confidence in our understanding. 7th edition. SSAR Herpetological Circular 39:1-92.","shortCitationAuthor":"Crother","shortCitationYear":2012,"referenceCode":"B12CRO01NAUS","lastModified":"2020-02-25T18:11:51.08501Z"},{"id":943912,"citation":"Crother, B. I. (editor). 2017. Scientific and standard English names of amphibians and reptiles of North America north of Mexico, with comments regarding confidence in our understanding. 8th edition. SSAR Herpetological Circular 43:1-104. [Updates in SSAR North American Species Names Database at: https://ssarherps.org/cndb]","shortCitationAuthor":"Crother","shortCitationYear":2017,"referenceCode":"B17CRO01EHUS","lastModified":"2020-02-25T18:11:53.413199Z"},{"id":112661,"citation":"Dowling, H. G. 1993. Viewpoint: a reply to Collins (1991, 1992). Herpetol. Rev. 24:11-13.","shortCitationAuthor":"Dowling","shortCitationYear":1993,"referenceCode":"A93DOW01NAUS","lastModified":"2020-02-25T18:11:56.616394Z"},{"id":463781,"citation":"Grismer, L. L. 2002. Amphibians and reptiles of Baja California including its Pacific islands and islands in the Sea of Cortes.  University of California Press, Berkeley. xiii + 399 pp.","shortCitationAuthor":"Grismer","shortCitationYear":2002,"referenceCode":"B02GRI01NAUS","lastModified":"2020-02-25T18:11:51.08501Z"},{"id":156806,"citation":"International Commission on Zoological Nomenclature (ICZN). 2002. <i>Crotaphytus vestigium</i> Smith & Tanner, 1972 (Reptilia, Squamata): specific name conserved. Bulletin of Zoological Nomenclature 59(3):228-229.","shortCitationAuthor":"ICZN","shortCitationYear":2002,"referenceCode":"A02ICZ01NAUS","lastModified":"2020-02-25T18:19:55.357989Z"},{"id":120544,"citation":"McGuire, J. A. 1996. Phylogenetic systematics of crotaphytid lizards (Reptilia: Iguania: Crotaphytidae). Bulletin of Carnegie Museum of Natural History (32):1-143.","shortCitationAuthor":"McGuire","shortCitationYear":1996,"referenceCode":"B96MCG01NAUS","lastModified":"2020-02-25T18:13:00.117163Z"},{"id":113061,"citation":"McGuire, J. A. 2000. <i>Crotaphytus vestigium</i> Smith &amp; Tanner, 1972 (Reptilia, Squamata): proposed conservation of the specific name. Bulletin of Zoological Nomenclature 57:158-161.","shortCitationAuthor":"McGuire","shortCitationYear":2000,"referenceCode":"A00MCG01NAUS","lastModified":"2020-11-11T02:09:55.627866Z"},{"id":722486,"citation":"McGuire, J. A., C. W. Linkem, M. S. Koo, D. W. Hutchison, A. K. Lappin, D. I. Orange, J. Lemos-Espinal, B. R. Riddle, and J. R. Jaeger. 2007. Mitochondrial introgression and incomplete lineage sorting through space and time: phylogenetics of crotaphytid lizards. Evolution 61:2879-2897. ","shortCitationAuthor":"McGuire et al.","shortCitationYear":2007,"referenceCode":"A07MCG01NAUS","lastModified":"2020-02-25T18:13:00.117163Z"},{"id":1153425,"citation":"Nicholson, K. E. (ed.). 2025. Scientific and Standard English Names of Amphibians and Reptiles of North America North of Mexico, with Comments Regarding Confidence in Our Understanding. Ninth Edition. Society for the Study of Amphibians and Reptiles. 87 pp. Online database available at: https://cnah.org/SSARnames.aspx","shortCitationAuthor":"Nicholson","shortCitationYear":2025,"referenceCode":"B25NIC01NAUS","lastModified":"2026-06-06T01:36:32.018241Z"},{"id":129828,"citation":"Nussbaum, R.A., E.D. Brodie, Jr., and R.M. Storm. 1983. Amphibians and Reptiles of the Pacific Northwest. University Press of Idaho, Moscow, Idaho. 332 pp.","shortCitationAuthor":"Nussbaum et al.","shortCitationYear":1983,"referenceCode":"B83NUS01NAUS","lastModified":"2020-02-25T18:12:10.866443Z"},{"id":144435,"citation":"Stebbins, R. C. 1985a. A field guide to western reptiles and amphibians. Second edition. Houghton Mifflin Company, Boston, Massachusetts. xiv + 336 pp.","shortCitationAuthor":"Stebbins","shortCitationYear":1985,"referenceCode":"B85STE01NAUS","lastModified":"2020-02-25T18:11:51.08501Z"},{"id":266629,"citation":"Stebbins, R. C. 2003. A field guide to western reptiles and amphibians. Third edition. Houghton Mifflin Company, Boston.","shortCitationAuthor":"Stebbins","shortCitationYear":2003,"referenceCode":"B03STE01NAUS","lastModified":"2020-02-25T18:11:51.08501Z"}],"otherCommonNames":[],"speciesGlobal":{"elementGlobalId":103364,"cites":null,"cosewic":null,"fwsRegion":null,"genusSize":{"id":3,"genusSizeDescEn":"Small genus","genusSizeDescEs":"Género pequeño","genusSizeDescFr":"Petit genre"},"jurisEndem":{"id":5,"jurisEndemDescEn":"occurs (regularly, as a native taxon) in multiple nations","jurisEndemDescEs":"Se encuentra en varias naciones (de manera regular, como un taxón nativo)","jurisEndemDescFr":"Se trouve dans plusieurs nations (de façon régulière, tel un taxon indigène)"},"nomenclaturallyEst":null,"usesa":null,"informalTaxonomy":{"informalTaxonomyId":7,"level1":"Animals","level2":"Vertebrates","level3":"Reptiles","level":3,"hasChildren":false,"parentId":2,"distributionStatus":"complete","displayOrder":1100},"parentSpecies":null,"infraspecies":false,"kingdom":"Animalia","phylum":"Craniata","taxclass":"Reptilia","taxorder":"Squamata","family":"Crotaphytidae","genus":"Crotaphytus","americanFisheriesStatus":null,"americanFisheriesStatusDate":null,"saraStatus":null,"saraStatusDate":null,"cosewicDate":null,"interpretedCosewic":null,"cosewicComments":null,"usesaDate":null,"interpretedUsesa":null,"usesaComments":null,"completeDistribution":true,"synonyms":[{"id":101905,"synonym":"Crotaphytus insularis vestigium","synonymAuthor":null,"formattedSynonym":"<i>Crotaphytus insularis vestigium</i>"}],"infraspeciesList":[],"ebarId":null,"ebarCanadianScope":false,"ebarGlobalScope":false,"ebarKbaGroup":"Amphibians and Reptiles","caGeneralStatusId":null},"speciesCharacteristics":{"elementGlobalId":103364,"reproductionComments":"Eggs presumably are laid in late spring-summer. Members of this genus have the potential of depositing two clutches of eggs per year (Nussbaum et al. 1983).","ecologyComments":null,"habitatComments":"This lizard inhabits rocky areas in arid and semiarid habitat, generally with scant xerophytic vegetation, including hillsides, alluvial fans, canyons, and lava flows (McGuire 1996, Grismer 2002). Eggs are laid presumably underground or under rocks.","generalDescription":null,"diagnosticCharacteristics":"Differs from all other CROTAPHYTUS except C. INSULARIS and C. RETICULATUS by the presence of widely separated posterior collars; differs from all other species of CROTAPHYTUS by the presence of slender, white transverse dorsal body bars; differs further from C. RETICULATUS, C. COLLARIS, C. NEBRIUS, and C. DICKERSONAE by the absence of black oral melanin; differs further from C. RETICULATUS, C. COLLARIS, and C. NEBRIUS by the presence in adult males of a strongly laterally compressed tail, a white or off-white dorsal caudal stripe, a pale tan or white patternless region on the dorsal surface of the head, and enlarged dark brown or black inguinal patches (vs. small patches of C. NEBRIUS and some C. COLLARIS); differs from C. INSULARIS by its broader process of the premaxilla and its more strongly developed posterior collar (McGuire 1996, which see for further information).","speciesMarineHabitats":[],"speciesTerrestrialHabitats":[{"cagTerrHabId":-109426,"terrestrialHabitat":{"id":4,"terrestrialHabitatDescEn":"Woodland - Hardwood","terrestrialHabitatDescEs":"Lote de madera - Madera dura","terrestrialHabitatDescFr":"Terrain boisé — Feuillu","displayOrder":6}},{"cagTerrHabId":-109427,"terrestrialHabitat":{"id":5,"terrestrialHabitatDescEn":"Woodland - Conifer","terrestrialHabitatDescEs":"Lote de madera - Conífera","terrestrialHabitatDescFr":"Terrain boisé — Résineux","displayOrder":7}},{"cagTerrHabId":-109428,"terrestrialHabitat":{"id":6,"terrestrialHabitatDescEn":"Woodland - Mixed","terrestrialHabitatDescEs":"Lote de madera - Mixto","terrestrialHabitatDescFr":"Terrain boisé — Mixte","displayOrder":8}},{"cagTerrHabId":-109423,"terrestrialHabitat":{"id":7,"terrestrialHabitatDescEn":"Shrubland/chaparral","terrestrialHabitatDescEs":"Matorral/Chaparral","terrestrialHabitatDescFr":"Fruticée/Chaparral","displayOrder":9}},{"cagTerrHabId":-109424,"terrestrialHabitat":{"id":11,"terrestrialHabitatDescEn":"Desert","terrestrialHabitatDescEs":"Desierto","terrestrialHabitatDescFr":"Désert","displayOrder":13}},{"cagTerrHabId":-109425,"terrestrialHabitat":{"id":17,"terrestrialHabitatDescEn":"Bare rock/talus/scree","terrestrialHabitatDescEs":"Roca viva/pendiente de roca/piedras sueltas","terrestrialHabitatDescFr":"Éboulis","displayOrder":20}}],"speciesRiverineHabitats":[],"speciesPalustrineHabitats":[],"speciesLacustrineHabitats":[],"speciesSubterraneanHabitats":[],"speciesEstuarineHabitats":[]},"primaryReference":{"id":1153425,"citation":"Nicholson, K. E. (ed.). 2025. Scientific and Standard English Names of Amphibians and Reptiles of North America North of Mexico, with Comments Regarding Confidence in Our Understanding. Ninth Edition. Society for the Study of Amphibians and Reptiles. 87 pp. Online database available at: https://cnah.org/SSARnames.aspx","shortCitationAuthor":"Nicholson","shortCitationYear":2025,"referenceCode":"B25NIC01NAUS","lastModified":"2026-06-06T01:36:32.018241Z"},"predecessors":[],"elementGlobalThreatAssessments":[]}