Amphibian Research
Research Articles
- Alvarez, J. A. and J. T. Wilcox. 2024. An effective method for long-term control of American bullfrogs syntopic with special-status native amphibians in California. Human–Wildlife Interactions 18:23–32.
- Rose, J.P., Kupferberg, S.J., Peek, R.A., Ashton, D., Bettaso, J.B., Bobzien, S., Bourque, R.M., Breedveld, K.G., Catenazzi, A., Drennan, J.E, Gonsolin, E., Grefsrud, M., Herman, A.E., House. M.R., Kluber, M.R., Lind, A.J., Marlow, K.R., Striegle, A., van Hattem, M., Wheeler, C.A., Wilcox, J.T., Wiseman, K.D., Halstead, B.J. 2023. Identifying drivers of population dynamics for a stream breeding amphibian using time series of egg mass counts. Ecosphere, 14(8), p.e4645.
- 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.
Graduate Student Theses
- Hale Garcia-Dean, 2025, Patterns of dispersal and short-term survivorship in post-metamorphic California Red-legged Frogs (Rana draytonii). MS thesis, Sonoma State University, Rohnert Park, California, USA.
- Jennaca Hajeck, 2023, A Telemetric Study of Migration and Habitat Use of the Post-breeding California Red-Legged Frog (Rana draytonii). MS thesis, Sonoma State University, Rohnert Park, California, USA.
- Anna Erway, 2022, "Comparative microhabitat use of two California native ranids, California red‐legged frog (Rana draytonii) and foothill yellow‐legged frog (Rana boylii), in a riparian woodland" MS thesis, Sonoma State University, Rohnert Park, California, USA.
- Daniel Hudson, 2020, "Differential Mate Choice Responses to Chemical Cues in Male and Female Rough-skinned Newts (Taricha granulosa)." MS thesis, Sonoma State University, Rohnert Park, California, USA.
- Lisa Surber, 2019, "Comparison of Habitat Use and Movement Patterns of Native and Invasive Frogs in a Grassland and Oak Savannah Habitat" MS thesis, Sonoma State University, Rohnert Park, California, USA.
Natural History Notes
- Ramirez, B.M., Wilcox J.T., Alvarez, J.A., Moore, B.A. 2025. Presumed Ocular Trauma in a Foothill Yellow-legged Frog. Sonoran Herpetologist 38 (4) 2025.
- Alvarez, J. A., J. T. Wilcox, and P. Garcia. 2025. Use of novel upland refugia by foothill yellow-legged frogs in the San Benito River Watershed, California. Sonoran Herpetologist 38:201-203.
- Wilcox J.T. and A.L. Erway. 2024. Atypical Timing and Placement of Egg Masses by Foothill Yellow-legged Frogs (Rana boylii) Baird 1854. Sonoran Herpetologist 37 (3) 2024.
- Wilcox J.T., Medrano, B.M. and Alvarez J.A. 2023. Pseudacris regilla (Pacific Chorus Frog). Predation. Herpetological Review 55(3), 2024.
- Alvarez, J. A., J. T. Wilcox, M, Scofield, M. Coyle, and T. Collins. 2024. Color Polymorphism and Individual Variation in Disparate Populations California Red-legged Frogs (Rana draytonii). Sonoran Herpetologist 37:1818-184.
- Alvarez, J. A., E. Gutberlet, and J. T. Wilcox. 2024. Cave use by the threatened Rana draytonii Baird and Girard, 1852. Herpetological Notes 17:445–448.
- Woodall, J., Hajek, J., Garcia-Dean, H., Fox, K., Wilcox, J.T. 2023. Taricha torosa (California Newt). Misdirected Group Amplexus. Herpetological Review 53(4), 2022
- Wilcox, J. T., and J. A. Alvarez. 2023. Turtles under ice. Western Wildlife 10:42–46.
- Erway, A. L., J. T. Wilcox, J. A. Alvarez. 2023. Rana draytonii (California red-legged frog) Diet. Herpetological Review. 54:437–438.
- 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.
- Alvarez, J. A., I. Jackson, M. Falicki, and J. T. Wilcox. 2023. Rana draytonii. (California red-legged frog). Larval malformation. Herpetological Review. 54:276–277
- Alvarez, J. A., M. Aiken, and J. T. Wilcox. 2023. Syntopy in California red-legged and foothill yellow-legged frogs in their aquatic habitat. California Fish and Wildlife 109:e16.
- Alvarez, J. A., M. Gaytan, and J. T. Wilcox. 2023. Rana draytonii (California red-legged frog). Anophthalmia. Herpetological Review. 54:90–91.
- Jeff A. Alvarez, Maresa Scofield, Francesca Cannizzo, Kimberly Comer, Marina L. Olson, Matt Coyle, and Jeffery 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.
- Jeff A. Alvarez, Marina Olson, and Jeffery 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 36(3):74-75
- Alvarez, J. A., L. L. Surber, E. A. Gallanty, and J. T. Wilcox. 2022. Small size of Rana boylii (Anura: Ranidae) at metamorphosis in a small stream may confound survey methods. Herpetology Notes 15:395–397.
- Alvarez, J. A., L. Solano, and J. T. Wilcox. 2022. Idiopathic ocular heterochromia in the California newt Taricha torosa. Sonoran Herpetologist 35(3):121–122.
- Alvarez, J. A., and J. T. Wilcox. 2022. Use of spring boxes by the threatened California red-legged frog Rana draytonii Baird and Girard 1852, in California, USA. 15:383–386.
- Alvarez, J. A., and J. T. Wilcox. 2022. Defensive display in the California tiger salamander, Ambystoma californiense (Caudata, Ambysomatidae). Herpetology Notes 15:85–86.
- Woodall, J., J. Hajek, H. Garcia-Dean, K. Fox, and J. T. Wilcox. 2022. TARICHA TOROSA (California Newt) MISDIRECTED GROUP AMPLEXUS. Herpetological Review 53(4) 644–6
- Alvarez, J. A., P. Lewis-Deweese, and J. T. Wilcox. 2022. Ocular bioflourenscence due to ultra-violet excitation in California red-legged frogs and foothill yellow-legged frogs, in central California. Herpetology Notes 35(4) 154–List Item
- Alvarez, J. A., and J. T. Wilcox. 2022. ANAXYRUS BOREAS (Western Toad) DEATH FEIGNING. Herpetological Review 53(3):461–462.
- Alvarez, J. A., J.T. Wilcox, and J. Jelencic. 2021. Cannibalism, and scavenging by Hyliola regilla Baird and Girard, 1852, tadpoles in California. Herpetology Notes 14:1163–1165
- Alvarez, J. A., M. A. Shea, S. M. Foster, and J. T. Wilcox. 2021. Use of atypical aquatic breeding habitat by the California tiger salamander. California Fish and Wildlife Special CESA Issue:235–240.
- 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.
- 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(2):293–299.
- 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.
- 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.
- Wilcox, J.T., and D. Hudson. 2020. TARICHA TOROSA (Pacific Coast Newt). MORTALITY. Herpetological Review 51 (1):95.
- Wilcox, J.T. 2019. ACTINEMYS MARMORATA (Northern Pond Turtle). DIET. Herpetological Review 50(3):553.
- Wilcox, J.T., C.D. Vang, B.R. Muller, and J.A. Alvarez. 2017. Drought influences reproductive timing in two newt (Taricha) congeners. Herpetological Notes 10:585–587.
- Wilcox, J.T. 2017. RANA BOYLII (Foothill Yellow-legged Frog). PREDATION. Herpetological Review 48(3):612–613.
- Wilcox, J.T., M.L. Davies, K.D. Wellstone, and M.F. Keller. 2017. Traditional Surveys may Underestimate Rana draytonii Egg Masses in Perennial Stock Ponds. California Fish and Game 103(2):66–71.
- Wilcox, J.T., G.E. Padgett-Flohr, J.A. Alvarez, and J.R. Johnson. 2015. Possible Phenotypic Influence of Superinvasive Alleles on Larval California Tiger Salamanders (Ambystoma californiense). American Midland Naturalist 173(1):168¬–175.
- 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(1):42–48
- Wilcox, J.T. 2011. RANA DRAYTONII (California Red-Legged Frog). PREDATION. Herpetological Review 42(3):414¬–415.
- Wilcox, J.T. 2010. ACTINEMYS (= EMYS) MARMORATA (Western Pond Turtle). PREDATION. Herpetological Review 41(2):212.
- Wilcox, J.T, B.D. Gibeson, and M.R. Jennings. 2008. AMBYSTOMA CALIFORNIENSE (California Tiger Salamander). Predation. Herpetological Review 39(1):74.
- Wilcox, J.T. 2006. RANA CATESBEIANA (American Bullfrog). DIET. Herpetological Review 37(4):447¬¬–448.
- Wilcox, J.T. 2005. RANA CATESBEIANA (American Bullfrog). DIET. Herpetological Review 36(3):306.
Rangeland Research
Native Grasses
Wildlife Research
Mammal Research Articles and Natural History Notes
- Wilcox, J.T. 2015. Implications of Predation by Wild Pigs on Native Vertebrates: a Case Study. California Fish and Game 101(1):72–77.
- Wilcox, J.T., and D.H. Van Vuren. 2009. Wild Pigs as Predators in Oak Woodlands of California. Journal of Mammalogy 90(1):114–118.
- Wilcox, J.T., and B.N. Larsen. 2008. A group defense incident involving juvenile Striped Skunks, Mephitis mephitis. Canadian Field-Naturalist 122(1):80-82.
- Bakker, V.J., D.H. Van Vuren, K.R. Crooks, C.A. Scott, J.T. Wilcox, and D.K. Garcelon. 2006. Serologic Survey of the Island Spotted Skunk on Santa Cruz Island. Western North American Naturalist 66(4):456–461.
- Crooks, K.R., D.K. Garcelon, C.A. Scott, J.E. Depue, J.T. Wilcox, R.B. Kimsey, and D. H. Van Vuren. 2004. Ectoparasites of a Threatened Insular Endemic Mammalian Carnivore: The Island Spotted Skunk. American Midland Naturalist 151:35–41.
- Wilcox, J.T., E.T. Aschehoug, C.A. Scott, and D. H. Van Vuren. 2004. A Test of the Judas Technique as a Method for Eradicating Feral Pigs. Transactions of the Western Section of the Wildlife Society 40:120-126.
- Crooks, K.R., D.K. Garcelon, C.A. Scott, J.T. Wilcox, S.F. Timm, and D.H. Van Vuren. 2003. Hematology and Serum Chemistry of the Island Spotted Skunk on Santa Cruz Island. Journal of Wildlife Diseases 39(20):460–466.
- Loggins, R.L., J.T. Wilcox, D.H. Van Vuren, and R.A. Sweitzer. 2002. Seasonal Diets of Wild Pigs in Oak Woodlands of the Central Coast Region of California. California Fish and Game 88(1):28–34.
Invertebrate Natural History Notes
- Wilcox, J.T. 2018. Jerusalem! I see linkages: The community value of a misunderstood insect. Grasslands Summer:6–8.
- Wilcox, J.T. 2017. Crab Spider: Grasslands Predator Hiding in Plain Sight. Grasslands Summer:2–4.
- Surber, L.L., and J.T. Wilcox. 2020. Larvae of the caddisfly Nerophilus californicus (Trichoptera: Odontoceridae) as scavengers of an American bullfrog, Lithobates catesbeianus (Anura: Ranidae) carcass. Pan Pacific Entomologist 96(1):1–6.
- Alvarez, J. A., and J. T. Wilcox. 2022. Defensive display in the California tiger salamander, Ambystoma californiense (Caudata, Ambysomatidae). Herpetology Notes 15:85–86.
- Woodall, J., J. Hajek, H. Garcia-Dean, K. Fox, and J. T. Wilcox. 2022. TARICHA TOROSA (California Newt) MISDIRECTED GROUP AMPLEXUS. Herpetological Review 53(4) 644–6
- Alvarez, J. A., P. Lewis-Deweese, and J. T. Wilcox. 2022. Ocular bioflourenscence due to ultra-violet excitation in California red-legged frogs and foothill yellow-legged frogs, in central California. Herpetology Notes 35(4) 154–List Item
Reptile Natural History Notes
- Wilcox, J.T. and Foster S.M. 2025. Predation of a Threatened Frog by a Common Garter Snake Includes an Equal Risk for Predator and Prey. Sonoran Herpetologist 38(4) 2025.
- 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(1):13–14.
- Alvarez, J.A., J.H. Valdez-Villavicencio, J. T. Wilcox, and A. P. Garcia. 2020. Bifurcation in the tail of the Black-tailed Brush Lizard (Urosaurus nigricaudus) in northern Baja California, Mexico. Sonoran Herpetologist 33(3):81.
Bird Research Articles and Natural History Notes
- Groves, J.A., Achatz, T.J., Kinsella, J.M., Calhoun, D.M., Wilcox, J.T., Greiman, S.E. and Johnson, P.T., 2025. A Survey of Endohelminth Diversity of Birds Collected in the San Francisco Bay Area. The Journal of Parasitology, 111(5), pp.658-668.
- Jeffery T. Wilcox and Ndumiso Collen Sibanda, 2023, North American Deermouse (Peromyscus maniculatus) Predation by a Steller’s Jay (Cyanocitta stelleri). Western Wildlife 10:18-20.
- 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.
- Wilcox, J.T. 2018. Onshore Foraging by an Eared Grebe. Western Birds 49:145–148.