selected publications academic article Binta Islam, S., Valles, D., Hibbitts, T. J., Ryberg, W. A., Walkup, D. K., & Forstner, M. (2023). Animal Species Recognition with Deep Convolutional Neural Networks from Ecological Camera Trap Images. Animals. 13(9), 1526-1526. Walkup, D. K., Ryberg, W. A., Pierce, J. B., Smith, E., Childress, J., East, F., ... Hibbitts, T. J. (2023). Testing the detection of large, secretive snakes using camera traps. 47(1), Bowers, B. C., Walkup, D. K., Hibbitts, T. J., Crump, P. S., Ryberg, W. A., Adams, C. S., & Lopez, R. R. (2022). An Evaluation of Western Chicken Turtle (Deirochelys reticularia miaria) Survey and Capture Protocols. Journal of Herpetology. 56(4), 489-498. Bowers, B. C., Hibbitts, R. L., Hibbitts, T. J., Walkup, D. K., Ryberg, W. A., Lopez, R. R., & Crump, P. S. (2022). Fecundity, Female Maturation, and Nesting Season of Western Chicken Turtles (Deirochelys reticularia miaria) in Texas. Chelonian Conservation Biology. 21(2), 225-231. Bylsma, R., Walkup, D. K., Hibbitts, T. J., Ryberg, W. A., Black, A. N., & DeWoody, J. A. (2022). Population genetic and genomic analyses of Western Massasauga (Sistrurus tergeminus ssp.): implications for subspecies delimitation and conservation. Conservation Genetics. 23(2), 271-283. Walkup, D. K., Lawing, A. M., Hibbitts, T. J., & Ryberg, W. A. (2022). Biogeographic consequences of shifting climate for the western massasauga (Sistrurus tergeminus). Ecology and Evolution. 12(2), e8599. Walkup, D. K., Ryberg, W. A., Hibbitts, T. J., Skow, K. L., Powers, G., Fitzgerald, L. A., Collier, B. A., & Lopez, R. R. (2022). USING LIDAR TO ENHANCE DISTRIBUTION MODELS FOR THE DUNES SAGEBRUSH LIZARD (SCELOPORUS ARENICOLUS) IN TEXAS, USA. 17(2), 349-361. Hibbitts, T. J., Walkup, D. K., LaDuc, T. J., Wolaver, B. D., Pierre, J. P., Duran, M., ... Ryberg, W. A. (2021). Natural history of the spot-tailed earless lizards (Holbrookia lacerata and H. subcaudalis). JOURNAL OF NATURAL HISTORY. 55(7-8), 495-514. Ryberg, W. A., Walkup, D. K., Hibbitts, T. J., Pittman, W., Porter, V. H., Bowers, B. C., ... Hagedorn, B. W. (2021). Effective Camera Trap Snake Surveys at a Rarely Accessible Longleaf Pine Savanna. Herpetological Review. 52(4), 719-724. Bowers, B. C., Walkup, D. K., Hibbitts, T. J., Crump, P. S., Ryberg, W. A., Lawing, A. M., & Lopez, R. R. (2021). SHOULD I STAY OR SHOULD I GO? SPATIAL ECOLOGY OF WESTERN CHICKEN TURTLES (DEIROCHELYS RETICULARIA MIARIA). 16(3), 594-611. Chan, L. M., Painter, C. W., Hill, M. T., Hibbitts, T. J., Leavitt, D. J., Ryberg, W. A., Walkup, D., & Fitzgerald, L. A. (2020). Phylogeographic structure of the dunes sagebrush lizard, an endemic habitat specialist. PLoS ONE. 15(9), e0238194-e0238194. Neuharth, D. B., Ryberg, W. A., Adams, C. S., Hibbitts, T. J., Walkup, D. K., Frizzell, S. L., ... Rudolph, D. C. (2020). Searching for rare and secretive snakes: are camera-trap and box-trap methods interchangeable?. Wildlife Research. 47(6), 476-484. Walkup, D. K., Ryberg, W. A., Fitzgerald, L. A., & Hibbitts, T. J. (2019). From the ground up: microhabitat use within a landscape context frames the spatiotemporal scale of settlement and vacancy dynamics in an endemic habitat specialist. Landscape Ecology. 34(11), 2631-2647. Ryberg, W. A., Garrett, T. B., Adams, C. S., Campbell, T. A., Walkup, D. K., Johnson, T. E., & Hibbitts, T. J. (2019). Life in the thornscrub: movement, home range, and territoriality of the reticulate collared lizard (Crotaphytus reticulatus). JOURNAL OF NATURAL HISTORY. 53(27-28), 1707-1719. Walkup, D. K., Riberg, W. A., Fitzgerald, L. A., & Hibbitts, T. J. (2018). OCCUPANCY AND DETECTION OF AN ENDEMIC HABITAT SPECIALIST, THE DUNES SAGEBRUSH LIZARD (SCELOPORUS ARENICOLUS). HERPETOLOGICAL CONSERVATION AND BIOLOGY. 13(3), 497-506. Walkup, D. K., Leavitt, D. J., & Fitzgerald, L. A. (2017). Effects of habitat fragmentation on population structure of dune-dwelling lizards. Ecosphere. 8(3), e01729-e01729. Hibbitts, T. J., Fitzgerald, L. A., Walkup, D. K., & Ryberg, W. A. (2017). Why didn't the lizard cross the road? Dunes sagebrush lizards exhibit road-avoidance behaviour. Wildlife Research. 44(3), 194-199. chapter Fitzgerald, L. A., Ryberg, W. A., Walkup, D. K., Hibbitts, T. J., Hill, M. T., Leavitt, D. J., Chan, L. M., & Parker, M. R. (2022). Ecology and Conservation of the Imperiled Dunes Sagebrush Lizard: An Ecological Specialist in a Threatened Ecosystem. Imperiled: The Encyclopedia of Conservation. (pp. 494-510). Elsevier. Fitzgerald, L. A., Walkup, D., Chyn, K., Buchholtz, E., Angeli, N., & Parker, M. (2018). The Future for Reptiles: Advances and Challenges in the Anthropocene. Encyclopedia of the Anthropocene. (pp. 163-174). Elsevier. conference paper Jacisin, J. J., Fielder, C., Hibbitts, T. J., Ryberg, W. A., Walkup, D. K., Meik, J. M., & Lawing, A. M. (2021). Morphological variation of cranial elements in the western massasauga (Sistrurus tergeminus). INTEGRATIVE AND COMPARATIVE BIOLOGY. E410-E411. institutional repository document Chan, L. M., Painter, C. W., Hill, M. T., Hibbitts, T. J., Leavitt, D. J., Ryberg, W. A., Walkup, D., & Fitzgerald, L. A. (2020). Phylogeographic structure of the dunes sagebrush lizard, an endemic habitat specialist thesis Walkup, D. K. (2018). Identifying Disruptions of Population Processes in Fragmented Landscapes for an Endemic Habitat Specialist, the Dunes Sagebrush Lizard (Sceloporus Arenicolus)
teaching activities RWFM350 Wildlife Population Dynamics Instructor RWFM408 Technqs Of Wldlfe Mgmt Instructor RWFM685 Directed Studies Instructor RWFM691 Research Instructor WFSC638 Technqs Of Wildlife Mgmt Instructor WFSC691 Research Instructor
education and training Ph.D. in Wildlife and Fisheries Science, Texas A&M University - (College Station, Texas, United States) 2018 M.A. in Teaching - Secondary Education, Western New Mexico University - (Silver City, New Mexico, United States) 2010 B.S. in Forestry and Wildlife, Western New Mexico University - (Silver City, New Mexico, United States) 2008