INVITED PAPERS:
Alvarez, J. A. 2022. Herpetological Musings: Dear fellow biologists, please share your observations, we need them. Herpetological Review 53:181–182. PDF
WILDLIFE (general) - entrapment:
Z. Frey, Z., A. Peralta-García, J. Valdez-Villavicencio, Norma S. González-Gutiérrez, and J. A. Alvarez. In Review. Wildlife entrapment in cattle guards, with special consideration for special-status herpetofauna. Western North American Naturalist.
Alvarez, J. A., J. T. Marty, K. Christopherson, P. Craig, D. Weber, and C. D. Vang. 2021. An unanticipated ecological trap: entrapment of the California tiger salamander in technogenic structures as a confounding stressor for a threatened species. Herpetological Review 52:274–278. PDF
INVERTEBRATES:
Alvarez, J. A., C. Rogers, and M. A. Shea. In Review. Restoration of bedrock vernal pools for the threatened vernal pool fairy shrimp in central California. Ecological Restoration.
Alvarez, J. A., and B. J. Alvarez. 2022. The current distribution and putative spread of the invasive channeled apple snail (Pomacea canaliculata) in California. Fish and Game Journal 108:e8. E-link
SALAMANDERS/NEWTS:
Alvarez, J. A., R. Anderson, B. Ahmed, S. Bylin, A. Casby, J. Daley, M. Falicki, M. Fee, Alex Freeman, J. Gaudio, J. Graves, C. Hamilton, K. Herrera, I. Jackson, and M. Zimmerman. 2023. A case of idiopathic ocular heterochromia in Ensatina eschscholtzii xanthoptica Gray, 1850, in northern California. Herpetology Notes 16:49–50. PDF
Alvarez, J. A., and J. T. Wilcox. 2022. Ecological context of size extremes at metamorphosis in the California tiger salamander (Ambystoma californiense). The Southwestern Naturalist 67:126-132. PDF
Alvarez, J. A., J. T. Marty, S. M. Foster, and A. Crawford. 2022. Unanticipated mortality in the threatened California tiger salamander (Ambystoma californiense) during routine trapping in California. Herpetological Review 54:90–91. PDF
Alvarez, J. A., J. T. Wilcox. and L. Solano. 2022. Idiopathic ocular heterochromia in the California newt, Taricha torosa. Sonoran Herpetologist 35:121–122. PDF
Cava, Z., K. M. Garten, S. M. Foster, and J. A. Alvarez. 2022. Observations of extreme dehydration and rehydration leading to recovery of a threatened California tiger salamander. Fish and Wildlife Journal 108:e9. E-link
Alvarez, J. A., and J. T. Wilcox. 2022. Defensive display in Ambystoma californiense (Salamandroidea: Ambystomatidae). Herpetology Notes 15:85–86. PDF
Alvarez, J. A., and C. Rogers. 2021. Previously undocumented habitat use by the California tiger salamander (Ambystoma californiense). Western Wildlife 8:47–50. PDF
Alvarez, J. A., M. A. Shea, J. T. Wilcox, and S. M. Foster. 2021. Use of atypical aquatic breeding habitat by the threatened California tiger salamander. California Fish and Wildlife Journal. California Fish and Wildlife Special CESA Issue: 235–240. PDF
Alvarez, J. A., and A. Meisel. 2021. Ambystoma californiense (California tiger salamander). Predation. Herpetological Review 52:367. PDF
Alvarez, J. A., J. T. Marty, K. Christopherson, P. Craig, D. Weber, and C. D. Vang. 2021. An unanticipated ecological trap: entrapment of the California tiger salamander in technogenic structures as a confounding stressor for a threatened species. Herpetological Review 52:274–278. PDF
Alvarez, J. A., C. B. Rogers, and J. T. Wilcox. 2021. A new insular population of arboreal salamander (Aneides lugubris) in the San Francisco Bay. Western Wildlife 8:13–17. PDF
Alvarez, J. A., and A. Meisel. 2017. Ambystoma californiense (California tiger salamander). Predation. Herpetological Review 48:596. PDF
Wilcox, J. T., C. D. Vang, B. R. Muller, and J. A. Alvarez. 2017. Drought influences reproductive timing in two newt (Taricha) congeners. Herpetology Notes 10:585–587. PDF
Alvarez, J. A., and S. M. Foster. 2016. Variability in the larval coloration of the California tiger salamander. Herp Nation 19:28–30. PDF
Wilcox, J. T., G. E. Padgett-Flohr, J. R. Johnson, and J. A. Alvarez. 2015. Possible phenotypic influence of superinvasive alleles on larval California tiger salamanders (Ambystoma californiense). American Midland Naturalist 173:168–175. PDF
Alvarez, J. A., M. A. Shea, J. T. Wilcox, M. L. Allaback, S. M. Foster, G. E. Padgett-Flohr, and J. L. Haire. 2013. Sympatry in California tiger salamander and California red-legged frog breeding habitat within their overlapping range. California Fish and Game 99:42–48. PDF
Alvarez, J. A. 2004. Overwintering California tiger salamander (Ambystoma californiense) larvae. Herpetological Review 35:344. PDF
Alvarez, J. A. 2004. Use of artificial egg laying substrate to detect California tiger salamanders (Ambystoma californiense). Herpetological Review 35:45–46. PDF
FROGS/TOADS:
Alvarez, J. A., and J. T. Wilcox. 2024. Diurnal versus nocturnal surveys for foothill yellow-legged frogs. Journal of Wildlife Mnagement (In Review - March 2024)
Alvarez, J. A., and J. T. Wilcox. 2024. Sympatry and Syntopy in California red-legged and foothill yellow-legged frogs in their aquatic habitat. California Fish and Game Jorunal (In Review - March 2024)
Alvarez, J. A., J. W. Jones, M. Santora, H. Sheldon, E. Lopez, and M. Coyle. 2024. Management considerations related to the ovipositioning phenology of the California red-legged frogs (Rana draytonii) in the Sierra Nevada of California. Western Wildlife (In Review - March 2024).
Alvarez, J. A., N. E. Murphey, and T. L. Lichty. 2023. Seeking concordance on the terminology of atypical amplexal behaviors in anurans. Herpetological Conservation and Biology. (In Review - December 2023).
Alvarez, J. A., M. Aiken, and J. T. Wilcox. 2023. Sympatry and syntopy in Californai red-legged and foothill yellow-legged frogs in their aquatic habitat. California Fish and Wildlife (In Review - December 2023).
Alvarez, J. A. and J. T. Wilcox. 2023. An effective method for long-term control of American bullfrogs syntopic with special-status native amphibians in California. Human-Wildlfie Interactions (In Press - Sept 2023).
Alvarez, J. A., E. Gutberlet, and J. T. Wilcox. 2023. Cave use by the threatened Rana draytonii Baird and Girard, 1852. Herpetological Notes (In Press - Sept 2023)
Navarro-Tiznado, E. A. H., J. Valdez-Villavicencio, N. S. González-Gutiérrez, J. A. Alvarez, J. T. Wilcox, A. Peralta-García, J. Quintana-Mondragón, and R. A. Lara-Resendiz. 2023. Bullfrog eradication index for selection of a pilot site in the Mediterranean region of Baja California, Mexico. Acta Biológica Colombiana (In Press - Sept 2023).
Alvarez, J. A., T. L. Lichty, N. E. Murphey, and M. Palladini. 2023. Rana draytonii (California red-legged frog). Cloacal prolapse. (In Press - Sept 2023).
Gallanty, E. A. O. J. Miano, and J. A. Alvarez. 2023. Lithobates catesbeianus (American bullfrog). Axanthism. Herpetological Review. (In Press - September 2023).
Alvarez, J. A., M. L. Olson, and J. T. Wilcox. 2023. Novel use of upland microhabitat by Rana boylii Baird 1854, in a perennial river drainage in the foothills of the Sierra Nevada, central California, USA. Sonoran Herpetologist (In Press - August 2023)
Meyers, L. T., N. Sutter, R. Anderson, and J. A. Alvarez. 2023. Interspecific amplexus between western spadefoot (Spea hammondii) and western toad (Anaxyrus boreas) in Yorba Linda, California. Sonoran Herpetologist 36:50–51. PDF
Alvarez, J. A., M. Scofield, F. Cannizzo, K. Comer, M. L. Olson, M. Coyle, and J. T. Wilcox. 2023. Post-fire survival of the threatened California red-legged frog in the Sierra Nevada following the Mosquito Fire. California Fish and Wildlife Journal 109:e7. PDF
Alvarez, J. A., M. Gaytan, and J. T. Wilcox. 2023. Rana draytonii (California red-legged frog). Anophthalmia. Herpetological Review. 54:90–91. PDF
Alvarez, J. A, and T. S. Kerss. 2023. Microhabitat use by post-metamorphic western spadefoot (Spea hammondii) in Central California. Sonoran Herpetologist 36:6–7. PDF
Peralta-García, A., J. A. Alvarez, J. H. Valdez-Villavicencio, B. D. Hollingsworth. 2022. Longevity in wild California red-legged frogs (Rana draytonii) from Baja California, México. Southern California Academy of Sciences Bulletin 121:135–138. PDF
Alvarez, J. A., Lewis-Deweese, and J. T. Wilcox. 2022. Ocular biofluorescence due to utra-violet excitation in California red-legged and foothill yellow-legged frogs, in central California, USA. Sonoran Herpetologist 35:151–153. PDF
Alvarez, J. A., and J. T. Wilcox. 2022. Anaxyrus boreas (Western Toad). Death Feigning. Herpetological Review. 53:461–462. PDF
Alvarez, J. A., and J. T. Wilcox. 2022. Use of spring boxes in California, by the threatened Rana draytonii Baird and Girard, 1852. Herpetology Notes 15:383–386. PDF
Alvarez, J. A., and J. T. Wilcox. 2022. Minimum size at metamorphosis in Rana boylii (Neobatrachia: Ranidae), in Central California. Herpetology Notes 15:395–397. PDF
Jansen, D. S., and J. A. Alvarez. 2022. Rana draytonii (California red-legged frog). Coloration. Herpetological Review 53:108. PDF
Alvarez, J. A., and J. L. Haire. 2021. Unken reflex in the California red-legged frog (Rana draytonii) in western North America. Southern California Academy of Sciences Bulletin 120:132–134. PDF
Alvarez, J. A., and J. T. Wilcox. 2021. Anaxyrus boreas (Western Toad). Opportunistic scavenging. Herpetological Review 52:820–821. PDF
Alvarez, J. A., T. Collins, and M. Coyle. 2021. Observation of predation of Hyliola regilla (Anura: Hylidae) by a post metamorphic Rana draytonii (Anura: Panidae). Herpetological Notes 14:1371–1372. PDF
Alvarez, J. A., K. M. Garten, and D. G. Cook. 2021. Limb malformation in a foothill yellow-legged frog (Rana boylii) from Sonoma County, California. Northwestern Naturalist 102:258–260. PDF
Pierce, M. T., J .T. Wilcox, A. L. Erway, V. L. Brunal, and J. A. Alvarez. 2021. Rana draytonii (California red-legged frog). Atypical Habitat. Herpetological Review 52:617–618. PDF
Alvarez, J. A., K. Garten, J. T. Wilcox, Z. Cava, A. Engstrom, J. Litteral, M. L. Olson, M. Peterson, H. Sardiñas, and M. Stake. 2021. Rana draytonii (California red-legged frog). Diet. Herpetological Review 52:618–619. PDF
Alvarez, J. A., J. T. Wilcox, and J. Jelincic. 2021. Cannibalism and scavenging by Hyliola regilla Baird and Girard, 1852 tadpoles in California. Herpetology Notes 14:1163–1165. PDF
Alvarez, J. A. and J. T. Wilcox. 2021. Observations of nocturnal habitat use by the Rana draytonii (California red-legged frog), and implications for restoration and other activities. Ecological Restoration 39:155–157. PDF
Alvarez, J. A., E. Lopez, T. Collins, A. Herman, J. Jelincic, M. L. Olson, B. Piontek, A. Ives Ringstad, and J. T. Wilcox. 2021. Misdirected amplexus between a Pacific treefrog (Pseudacris regilla) and a western toad (Anaxyrus boreas) in a Northern California upland. Northwestern Naturalist 102:161–163. PDF
Alvarez, J. A., and J. T. Wilcox. 2021. Observations of atypical habitat use by foothill yellow-legged frogs (Rana boylii) in the Coast Range of California. Western North American Naturalist 81:293–299. PDF
Alvarez, J. A., M. A. Shea, and J. T. Wilcox. 2021. Upwardly mobile: vertical movement of California red-legged frogs (Rana draytonii), and its management implications. Herpetology Notes 14:839–841. PDF
Alvarez, J. A., A. Ives Ringstad, and J. T. Wilcox. 2020. Rana draytonii (California red-legged frog). Diet. Herpetological Review 51:824. PDF
Alvarez, J. A., S. M. Foster, B. R. Muller, and C. D. Vang. 2020. Davian behaviour in the threatened California red-legged frog (Rana draytonii): more than just a waste of time. The Herpetological Bulletin 154:41–42. PDF
Wilcox, J. T., and J. A. Alvarez. 2019. Wrestling for real estate: Male-male interactions in breeding foothill yellow-legged frogs (Rana boylii). Western Wildlife 6:14–17. PDF
Alvarez, J. A., D. G. Cook, J. L. Yee, M. G. van Hattem, D. R. Fong, and R. Fisher. 2013. Comparative microhabitat characteristics as oviposition sites of the California red-legged frog. Herpetological Conservation and Biology 8:539–551. PDF
Alvarez, J. A., M. A. Shea, J. T. Wilcox, M. L. Allaback, S. M. Foster, G. E. Padgett-Flohr, and J. L. Haire. 2013. Sympatry in California tiger salamander and California red-legged frog breeding habitat within their overlapping range. California Fish and Game 99:42–48. PDF
Alvarez, J. A. 2013. Rana draytonii (California red-legged frog). Cannibalism. Herpetological Review 44:126–127. PDF
Alvarez, J. A., M. A. Shea, and S. M. Foster. 2013. Rana draytonii (California red-legged frog). Association with Beaver. Herpetological Review 44:127–128. PDF
Alvarez, J. A., E. Solana, and S. M. Foster 2013. Agalychnis callidryas (Red-eyed tree frog). Predation. Herpetological Review 44: 117–118. PDF
Alvarez, J. A. 2011. Bufo boreas (Western toad). Davian Behavior. Herpetological Review 42:408–409. PDF
Alvarez, J. A. 2005. Unanticipated predation of California red-legged frog at constructed wetlands (California). Ecological Restoration 21:66–67. PDF
Alvarez, J. A., C. Dunn, and A. Zuur. 2004. Response of California red-legged frogs to removal of non-native fish. Transactions of the Western Section of the Wildlife Society 38/39:9–12. PDF
Alvarez, J. A. 2004. Rana aurora draytonii (California red-legged frog) Microhabitat. Herpetological Review 35:162–163. PDF
Fellers, G. M., A Launer, G. Rathbun, S. Bobzien, J. Alvarez, D. Sterner, R. Seymour, and M. Westphal. 2001. Overwintering tadpoles in the California red-legged frog (Rana aurora draytonii). Herpetological Review 32:156–157. PDF
TURTLES:
Wilcox, J. T., and J. A. Alvarez. 2023. Turtles under ice. Western Wildlife (In Review)
von Ehrenkrook, A., M. Sierra, M. Stevens, and J. A. Alvarez. 2023. Atypical scutation in the red-eared slider in the Central Valley of California. Herpetological Notes (In Press - Sept 2023).
Alvarez, J. A., N. Mokhayesh., and J. T. Wilcox. 2022. Actinemys marmorata (Northwestern pond turtle) Supernumery scutation. Herpetological Review. (In Press - Sept 2023)
Richardson, A., B. Rozumowicz-Kodsontie, and J. A. Alvarez. 2022. Chelydra serpentina (Common Snapping Turtle). Geographic distribution. Herpetological Review. (In Press - Sept 2023)
Alvarez, J. A., R. Gaitan, M. A. Shea, and S. M. Foster. 2021. Unintended entrainment of western pond turtle (Actinemys marmorata) during algae control on a newly restored wetland. Ecological Restoration 39:223–225. PDF
Foster, S. M., S. Gergeni, K. A. Davidson, L. Stevenot, and J. A. Alvarez. 2021. Successful nest intervention for declining turtle species - the Northwestern (Actinemys marmorata) and Southwestern pond turtle (Actinemys pallida). Herpetological Bulletin 157:25–26. PDF
Alvarez, J. A., A. Richardson, and B. Rozumowicz-Kodsontie. 2021. Actinemys pallida (Southwestern pond turtle). Nest destruction. Herpetological Review 52:384. PDF
Alvarez, J. A. 2021. Actinemys marmorata (Northwestern pond turtle). Nesting after injury. Herpetological Review 52:124. PDF
Davidson, K. A., and J. A. Alvarez. 2020. A review and synopsis of nest site selection and site characteristics of western pond turtle. Western Wildlife 7:412–49. PDF
Davidson, K. A., L. M. Asseo, DVM, and J. A. Alvarez. 2020. Actinemys marmorata (Northern Pond Turtle) and Actinemys pallida (Southwestern Pond Turtle). Spectacle retention. Herpetological Review 51:307–308. PDF
Alvarez, J. A., and K. D. Davidson. 2018. Actinemys marmorata (Northwestern Pond Turtle). Atypical Nests. Herpetological Review 49:101–103. PDF
Alvarez, J. A., G. Kittleson, K. A. Davidson, and L. M. Asseo. 2017. Potential injury and mortality to the southwestern pond turtle (Actinemys pallida) during restoration and maintenance activities. Western Wildlife 4:81–85. PDF
Alvarez, J. A., K. A. Davidson, and S. M. Foster. 2014. Actinemys marmorata (Western Pond Turtle). Nest predation. Herpetological Review 45:307–308. PDF
Alvarez, J. A. 2006. Actinemys marmorata. (Pacific Pond Turtle) Refugia. Herpetological Review 37:339–340. PDF
Alvarez, J. A. 2006. Use of artificial basking substrate to detect and monitor Pacific pond turtles (Emys marmorata). Western North American Naturalist 66:129–131. PDF
LIZARDS:
Perpignani, R. and Jeff A. Alvarez. 2023. An observation of tail-bifurcation in a gilbert’s skink, Plestiodon gilberti. Sonran Herpetologist. 36:8–9. PDF
Alvarez, J. A., J. H. Valdez-Villavicencio, J. T. Wilcox, and A. Peralta-Garcia. 2020. Bifurcation in the tail of the Black-tailed Brush Lizard (Urosaurus nigricaudus) in northern Baja California, Mexico. Sonoran Herpetologist 33:81. PDF
SNAKES:
Alvarez, J. A., and C. D. Vang. In Review. Distribution of the western black-headed snake, Tantilla planiceps, in California: implications for management. Fish and Game Journal.
Alvarez, J. A., and A. Murphy. In Prep. Masticophis lateralis (California whipsnake). Food items. Herpetological Review.
Venegas, J., L. T. Myers, S. M. Foster, A. Peralta-García, J. H. Valdez-Villavicencio, J. A. Alvarez. 2024. Thamnophis hamonndii (Two-striped Garter Snake). Prey. (In Press -September 2024)
Murphy, A. C., and J. A. Alvarez. 2023. Using chin spot pattern to differentiate individual Masticophis lateralis Hallowell, 1853 on the Pacific Coast of the United States. Herpetology Notes 16:615–618. PDF
Jansen, D. S., and J. A. Alvarez. 2022. Masticophis lateralis euryxanthus (Alameda whipsnakes). Entrapment. Herpetological Review 53:699–700. PDF
Alvarez, J. A. 2022. Tantilla planiceps (Western black-headed snake). Diet. Herpetological Review 53:522. PDF
Alvarez, J. A., and A. Murphy. 2022. Arboreality in the California whipsnake (Masticophis lateralis): Implications for survey techniques. Southern California Academy of Sciences Bulletin 121:34–40. PDF
Garten, K. M., J. A. Alvarez, and Z. A. Cava. 2022. Crotalus scutulatus (Mojave rattlesnake). Predation. Herpetological Review 53:338–339. PDF
Alvarez, J. A., C. Alvarado-Laguna, J. H. Valdez-Villavicencio, E. K. Lopez, R. A. Lara-Resendiz. 2022. Prolapsed hemipenis in an adult Baja California Coachwhip (Masticophis fuliginosus) in the Sierra San Pedro Mártir, Baja California, México. Sonoran Herpetologist 35:94–95. PDF
Alvarez J. A., A. Peralta-García, J. H. Valdez-Villavicencio, J. T. Wilcox, N. S. González, M. W. Anderson, R. Anderson, M. C. Bailey, Z. Cava, M. Falicki, E. Gallanty, K. M. Garten, D Howland, and L. T. Myers. 2021. An observation of multiple idiopathic kyphoscoliosis in a free-roaming California glossy snake (Arizona elegans occidentalis) in northwestern Baja California, México. Sonoran Herpetologist 34:87–89. PDF
Alvarez, J. A., D. S. Jansen, C. Shafer, and J. DiDonato. 2021. Observations of the phenology of the threatened Alameda whipsnake (Masticophis lateralis euryxanthus). California Fish and Wildlife Journal. California Fish and Wildlife Special CESA Issue 258–263. PDF
Alvarez, J. A., K. A. Davidson, F. Villalba, D. Amador, and A. V. Sprague. 2021. Atypical habitat use by the threatened Alameda whipsnake in the eastern Bay Area of California. Western Wildlife 8:8–12. PDF
Wilcox, J. T., J. C. Dittes, J. E. Howard, and J. A. Alvarez. 2021. Opportunism and dietary extremism leading to mortality in the gopher snake (Pituophis catenifer). Sonoran Herpetologist. 34:13–14. PDF
Miller, A., and J. A. Alvarez. 2017. Habitat use and management considerations for the threatened Alameda whipsnake (Masticophis lateralis euryxanthus) in Central California. Western Wildlife 3:29–32. PDF
Allaback, M. L., D. M. Laabs, J. A. Alvarez, and J. Anderson. 2016. Thamnophis sirtalis tetrataenia (San Francisco garter snake). Upland habitat use. Herpetological Review 46:278. PDF
Alvarez, J. A. 2006. Masticophis lateralis euryxanthus (Alameda whipsnake) Habitat. Herpetological Review 37:233. PDF
Alvarez, J. A., M. A. Shea, and A. Murphy. 2005. A compilation of observations of Alameda whipsnakes outside of typical habitat. Transactions of the Western Section of the Wildlife Society 41:21–25. PDF
BIRDS:
Wilcox, J. T., L. T. Myers, I. Jackson, and J. A. Alvarez. 2023. Apparent object play in the Northern harrier. Western Birds 54:153–156. PDF
Alvarez, J. A. 2022. Common Ravens prey on cliff swallow nestlings in the Central Valley, California. Central Valley Birds 24:109–114. PDF
RODENTS:
Alvarez, J. A. 2002. Symbiosis and cohabitation of native wildlife within California ground squirrel burrow systems. Western Wildlife. (In Press - Oct 2023).
Polvorosa Kline, M., J. A. Alvarez, and N. Parizeau. 2018. Kleptoparasitism of harvester ants by the giant kangaroo rat in the Carrizo Plain, California. Western North American Naturalist 78:208–211. PDF
Alvarez, J. A., M. A. Shea, and S. M. Foster. 2013. Rana draytonii (California red-legged frog). Association with Beaver. Herpetological Review 44:127–128. PDF
BATS:
Alvarez, J. A. et al. In Prep. Bat roosts in California: a review and implications for management. California Fish and Wildlife Journal
Alvarez, J. A. 2004. An easily constructed Tuttle trap for bats. Wildlife Society Bulletin 32:264–266. PDF
CARNIVORES:
Alvarez, J. A. In Prep. Historic and current distribution of wolves in California. California Fish and Wildlife Journal
