

Toby Hibbitts
Research Scientist
thibbitts@tamu.edu (979) 845-5783 Curriculum VitaeDr. Toby Hibbitts joined the Texas A&M Natural Resources Institute in 2012 as a research scientist. His research program focuses on amphibians and reptiles. He is interested in natural history, ecology, behavior and taxonomy. All of these factors are important for making informed conservation decisions about species.
Toby also works as the curator of amphibians and reptiles at the Biodiversity Research and Teaching Collection at Texas A&M University.
He received a Bachelor of Science in biology from Midwestern State University, a Master of Science in wildlife and fisheries sciences from Texas A&M and a doctorate in animal, plant and environmental science from the University of the Witwatersrand.
Toby comes from a family of Texas naturalists and enjoys outdoor sporting activities and travel.
Peer-Reviewed Publications
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Habitat use of the Texas Alligator Lizard in Central Texas
May 2025
Fielder, C., W. Ryberg, D. Walkup, J Holmes, and T. Hibbitts. 2025. Habitat use of the Texas Alligator Lizard in Central Texas. Journal of Natural History. 59, 1449-1467.
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Genome-wide Data Reinforces the Evolutionary Relationships of Previously Problematic Earless Lizards (Phyrnosomatidae: Holbrookia)
Jul 2024
Firneno, T.J., C.E. Roelke, A.D. Leaché, N.D. Rains, T.J. Hibbitts, W.A. Ryberg, T.J. Laduc, S. Singhal, and M.K. Fujita. 2024. Genome-wide Data Reinforces the Evolutionary Relationships of Previously Problematic Earless Lizards (Phyrnosomatidae: Holbrookia). Bulletin of the Society of Systematic Biologists 3(2)
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Morphology and vocalization comparison of the Houston Toad and the Dwarf American Toad: implications for their historic range
Jul 2024
MacLaren, A.R., T.J. Hibbitts, M.R.J. Forstner, and S.F. McCracken. 2024. Morphology and vocalization comparison of the Houston Toad and the Dwarf American Toad: implications for their historic range. PeerJ 12:e17635.
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Distribution and Demography of the Alligator Snapping Turtle (Macrochelys temminckii) in Texas: A 20-Year Perspective
Jun 2024
Rosenbaum, D., D.C. Rudolph, D. Saenz, L.A. Fitzgerald, R.E. Nelson, C.S. Collins, T.J. Hibbitts, R.W. Maxey, P. Crump, and C.M. Schalk. 2023. Distribution and Demography of the Alligator Snapping Turtle (Macrochelys temminckii) in Texas: A 20-Year Perspective. Southeastern Naturalist 22:197-220.
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Camera-trap Basking Arrays Detect Western Chicken Turtles (Deirochelys reticularia miaria) in Dynamic Ephemeral Wetland Mosaics
Dec 2023
Bowers, B.C., C.M. Fielder, D.K. Walkup, R.R. Lopez, W.A. Ryberg, T.J. Hibbitts, M.R. Parker, and P.S. Crump. 2023. Camera-trap Basking Arrays Detect Western Chicken Turtles (Deirochelys reticularia miaria) in Dynamic Ephemeral Wetland Mosaics. Herpetological Review 54, 368-372.
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Spatial ecology of the Texas Alligator Lizard (Gerrhonotus infernalis) in Blanco County, Texas
Oct 2023
Fielder, C.M., W.A. Ryberg, D.K. Walkup, J.M. Holmes, and T.J. Hibbitts. 2023. Spatial ecology of the Texas Alligator Lizard (Gerrhonotus infernalis) in Blanco County, Texas. Western North American Naturalist 83, 315-324.
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Lessons learned from a conservation translocation of a microendemic habitat specialist
Jul 2023
Parker, M.R., T.J. Hibbitts, W.A. Ryberg, and L.A. Fitzgerald. 2023. Lessons learned from a conservation translocation of a microendemic habitat specialist. Restoration Ecology, e13981.
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Animal Species Recognition with Deep Convolutional Neural Networks from Ecological Camera Trap Images
May 2023
Islam, S.B., D. Valles, T.J. Hibbitts, W.A. Ryberg, D.K. Walkup, and M.R.J. Forstner. 2023. Animal species recognition with deep convolutional neural networks from ecological camera trap images. Animals 13:1526.
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An Evaluation of Western Chicken Turtle (Deirochelys reticularia miaria) Survey and Capture Protocols
Dec 2022
Bowers, B.C., D.K. Walkup, T.J. Hibbitts, P.S. Crump, W.A. Ryberg, C.S. Adams, and R.R. Lopez. 2022. An Evaluation of Western Chicken Turtle (Deirochelys reticularia miaria) Survey and Capture Protocols. Journal of Herpetology, 56, 489-498.
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Fecundity, Female Maturation, and Nesting Season of Western Chicken Turtles (Deirochelys reticularia miaria) in Texas
Oct 2022
Bowers, B.C., Hibbitts, R.L., Hibbitts, T.J., Walkup, D.K., Ryberg, W.A., Lopez, R.R. and P.S. Crump. 2022. Fecundity, Female Maturation, and Nesting Season of Western Chicken Turtles (Deirochelys reticularia miaria) in Texas. Chelonian Conservation and Biology, 21, 225-234.
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Testing the detection of large, secretive snakes using camera traps
Oct 2022
Walkup, D.K., W.A. Ryberg, J.B. Pierce, E. Smith, J. Childress, F. East, B.L. Pierce, P. Brown, C.M. Fielder, and T.J. Hibbitts. 2022. Testing the detection of large, secretive snakes using camera traps. Wildlife Society Bulletin e1408, https://doi.org/10.1002/wsb.1408.
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Assessing Traffic Threats for Amphibian and Reptile Species of Greatest Conservation Need on Texas Roadways: Final Report
Oct 2022
Walkup, D.K., K.L. Skow, T.J. Hibbitts, W.A. Ryberg, and R.R. Lopez. 2022. Assessing Traffic Threats for Amphibian and Reptile Species of Greatest Conservation Need on Texas Roadways. Final Research Report submitted to Texas Department of Transportation. 620 pp.
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Using LiDAR to Enhance Distribution Models for the Dunes Sagebrush Lizard (Sceloporus arenicolus) in Texas, USA
Aug 2022
Walkup, D.K., W.A. Ryberg, R.J. Hibbetts, K.L. Skow, G. Powers, L.A. Fitzgerald, B.A. Collier, and R.R. Lopez. 2022. Using LiDAR to enhance distribution models for the dunes sagebrush lizard (Sceloporus arenicolus) in Texas, USA. Herpetological Conservation and Biology, 17, 349-361.
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Ecology and Conservation of the Imperiled Dunes Sagebrush Lizard: An Ecological Specialist in a Threatened Ecosystem
Jun 2022
Fitzgerald, L.A., W.A. Ryberg, D.K. Walkup, T.J. Hibbitts, M.T. Hill, D.J. Leavitt, L.M. Chan, and M.R. Parker. 2022. Ecology and Conservation of the Imperiled Dunes Sagebrush Lizard: An Ecological Specialist in a Threatened Ecosystem. Imperiled: The Encyclopedia of Conservation, Elsevier, 1-16.
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Notes on Texas Alligator Lizard (Gerrhonotus internalis) Nesting Behavior
Mar 2022
Fielder, C., J. Holmes, and T. Hibbitts. 2022. Gerrhonotus infernalis (Texas Alligator Lizard) Nesting Behavior. Herpetological Review 53, 132-133.
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Effective Camera Trap Snake Surveys at a Rarely Accessible Longleaf Pine Savanna
Dec 2021
Ryberg, W.A., D.K. Walkup, T.J. Hibbitts, W. Pittman, V.H. Porter, B.C. Bowers, C.M. Fielder, P. Brown, R.R. Lopez, J.R. Preston, J.T. Johnson, B.W. Hagedorn. 2021. Effective camera trap snake surveys at a rarely accessible longleaf pine savanna. Herpetological Review, 52, 719-724.
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Should I Stay or Should I Go? Spatial Ecology of Western Chicken Turtles (Deirochelys reticularia miaria)
Dec 2021
Bowers, B.C., D.K. Walkup, T.J. Hibbitts, P.S. Crump, W.A. Ryberg, A.M. Lawing, R.R. Lopez. 2021. Should I stay or should I go? Spatial ecology of western chicken turtles (Deirochelys reticularia miaria). Herpetological Conservation and Biology, 16, 594-611.
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Notes on Western Chicken Turtle Disking and Predation
Dec 2021
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Population genetic and genomic analyses of Western Massasauga (Sistrurus tergeminus ssp.): implications for subspecies delimitation and conservation
Nov 2021
Bylsma, R., D.K. Walkup, T.J. Hibbitts, W.A. Ryberg, A.N. Black, J.A. DeWoody. 2021. Population genetic and genomic analyses of Western Massasauga (Sistrurus tergeminus ssp.): implications for subspecies delimitation and conservation. Conservation Genetics, pp.1-13.
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Natural history of the spot-tailed earless lizards (Holbrookia lacerata and H. subcaudalis)
Sep 2021
Hibbitts, T.J., D.K. Walkup, T.J. LaDuc, B.D. Wolaver, J.P. Pierre, M. Duran, D. Neuharth, S. Frizzell, C.S. Adams, T.E. Johnson, D. Yandell, and W.A. Ryberg. 2021. Natural History of the Spot-tailed Earless Lizards (Holbrookia lacerata and H. subcaudalis). Journal of Natural History 55:7-8. DOI: 10.1080/00222933.2021.1907469
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Phylogeographic structure of the dunes sagebrush lizard, an endemic habitat specialist
Sep 2020
Chan, L.M., Painter, C.W., Hill, M.T., Hibbitts, T.J., Leavitt, D.J., Ryberg, W.A., Walkup, D. and Fitzgerald, L.A., 2020. Phylogeographic structure of the dunes sagebrush lizard, an endemic habitat specialist. Plos one, 15(9), p.e0238194.
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Searching for rare and secretive snakes: are camera-trap and box-trap methods interchangeable?
Jul 2020
Neuharth, D.B., W.A. Ryberg, C.S. Adams, T.J. Hibbitts, D.K. Walkup, S.L. Frizzell, T.E. Johnson, B.L. Pierce, J.B. Pierce and D.C. Rudolph. 2020. Searching for rare and secretive snakes: are cameratrap and box-trap methods interchangeable?. Wildlife Research 47: 476-484.
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New County Records for the Panhandle Region of Texas, USA
Mar 2020
Fielder, C.M., D.K. Walkup, W.A. Ryberg, and T.J. Hibbitts. 2020. New County Records for the Panhandle Region of Texas, USA. Herpetological Review 51(1): 87-89.
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Natural History Notes 49 Holbrookia Lacerata (Spot-tailed Earless Lizard) Predation
Dec 2018
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Natural History Notes Holbrookia lacerata (Spot-tailed Earless Lizard) Burying Behavior
Sep 2018
Neuharth, D., D.K. Walkup, S. Frizzell, J. Kachel, C.S. Adams, T. Johnson, T.J. Hibbitts, and W.A. Ryberg. 2018. Holbrookia lacerata (Spot-tailed Earless Lizard) Burying Behavior. Herpetological Review 49:536-37.
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Natural History Notes Holbrookia lacerata (Spot-tailed Earless Lizard) Predation
Sep 2018
Neuharth, D., S. Frizzell, W.A. Ryberg, and T.J. Hibbitts. 2018. Holbrookia lacerata (Spot-tailed Earless Lizard) Predation. Herpetological Review 49:537.
Research Reports
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Habitat Suitability Modeling for the Houston Toad
Mar 2024
Bowers, B.C., D.K. Walkup, T.J. Hibbitts, P.S. Crump, A.M. Lawing, W.A. Ryberg. 2024. Habitat Suitability Modeling for the Houston Toad. Texas A&M Natural Resources Institute, College Station, Texas. [https://nri.tamu.edu/publications/research-reports/2024/habitat-suitability-modeling-for-the-houston-toad/]