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Randy Simpson, Ph.D.

Wildlife Biology Program

..."Then, what do you search for?"... We search for something that will seem like truth to us; we search for understanding; we search for that principle which keys us deeply into the pattern of all life; we search for the relations of things, one to another...

John Steinbeck; The Log from the Sea of Cortez  

Dr. Randy Simpson

Thomas Randy

Simpson, Ph.D.

Director, Wildlife Biology Program

Phone: 512-245-3814
Fax: 512-245-8713
E-mail: r_simpson@txstate.edu


Mailing Address


Biology Department
Texas State University
601 University Drive
San Marcos, TX 78666

Blue Sunset

Research Interests

  • Wildlife Management
  • Vertebrate Ecology
  • Resource Selection
  • Invasive Species
  • Current research topics:
    1. Ecology of the Coastal Kangaroo Rat
      2. Food habits of Sable Antelope in Central Texas
      3. Food habits using DNA extraction from fecal material
      4. Rio Grande Beaver ecology in Big Bend National Park
      5. Urban small mammal populations
      6. Continuing long term study of the Texas River Cooter

Blacktail snake Whip Poinsetti


Courses Taught

  • Techniques in Wildlife Management (Bio 4435/5435)
  • Natural History of the Vertebrates (Bio 4420/5420)
  • Wildlife and Recreation: Impact, Policy, and Management (Bio 4304, Bio 7325)
  • Natural History and Conservation of Large Mammals (Bio 7324) - co-instructor with Dr. John Baccus and Dr. Butch Weckerly
  • Seminar (Bio 5110W) - Wildlife Disease, Urban Issues

PoinsettiSnake party San Bernard

Other Sites of Interest: Wildlife Society


Selected Publications

Lyons, J. I. N., T. R. Simpson, F. L. Rose. 2014. Morphology of an Inland Population of the Keeled Earless Lizard (Holbrookia propinqua). Submitted to Southwestern Naturalists, 20 June 2013, in press.

Mali, I., T. R. Simpson, F. L. Rose. 2014. Reproductive demography of two closely related emydine turtles in a spring fed system. Submitted to Southwestern Naturalists 30 April 2013; in press.

Small, M. F., J. T. Baccus, T. R. Simpson, and M. A. Rothrock. 2013. Productivity of an urban White-winged Dove population in Harris, Waller, and Fort Bend counties, Texas. Bulletin of the Texas Ornithological Society 46(1-2)19-21.

Ferrato, J. R., M. F. Small, T. R. Simpson, J. A. Veech, Mark Conway. Definitive nesting of Seaside Sparrows at Laguna Atascosa National Wildlife Refuge, Cameron County, Texas. Bulletin of the Texas Ornithological Society 46(1-2)62-63.

Baccus, J. T., K. Dees, M. F. Small, and T. R. Simpson. 2012. Fecundity in wild Northern Bobwhite hens under hatchery conditions. Proceedings of the National Ouail Symposium 7:83-86.

Kinsey, J. C., M. F. Small, T. R. Simpson, R. M. Perez, and J. T. Baccus. 2012. Testing propagatioin effectiveness of the Surrogator for Northern Bobwhites in southern Texas. Proceedings of the National Ouail Symposium 7:77-82.

King, C. M., T. R. Simpson, J. T. Baccus, and M. C. Green. 2011. Habitat use by Great-tailed
Grackles (Quiscalus mexicanus) in urban and peri-urban habitats of San Marcos, Hays County, Texas.
Bulletin of the Texas Ornithological Society 44(1-2):84-89.

Brown, D. J., V. R. Farallo, J. R. Dixon, J. T. Baccus, T. R. Simpson, M. R. J. Forstner. 2011. Freshwater Turtle Conservation in Texas: Harvest Effects and Efficacy of the Current Management Regime. Journal of Wildlife Management 75(3):486-494.

Milholland, M. T., J. P. Shumate, T. R. Simpson, R. W. Manning. 2010. Nutria (Myocastor coypus) in Big Bend National Park; an Exotic species in Desert wetlands. Texas Journal of Science 62(3):205-222.

Swanson, R., C. Swanson, T. R. Simpson. 2010. Geographic Distribution (DeWitt County, Texas). Pseudacris clarkii. Herpetological Review 41(3):376.

Rose, Francis L., Thomas R. Simpson, James R. Ott, and Richard W. Manning. 2010. Use of space by western cottonmouths (Agkistrodon piscivorus leucostoma) inhabiting a variable-flow stream. Southwestern Naturalist 55(2):160-166

Rose, Francis L., Thomas R. Simpson, James R. Ott, Richard W. Manning, and Julien Martin. 2010.  Survival of western cottonmouths (Agkistrodon piscivorus leucostoma) in          a pulsing environment. Southwestern Naturalist 55(1):11-15.

Small, M. F., J. T. Baccus, T. R. Simpson, M. C. Frisbie. 2010. Home ranges of two populations of urban-nesting white-winged doves (Zenaida asiatica) in Texas. Southwestern Naturalist 55(1):29-34.

Korn, Jennifer M, Thomas R. Simpson, John T. Baccus, and Stephen L. Jester. 2009. Evaluating avian communities of the Blanco River Valley using occupancy modeling and landowner surveys. Bulletin of the Texas Ornithological Society 42(1-2):70-78.

Aurora, A. L., T. R. Simpson, M. F. Small, and K. C. Bender. 2009. Towards increasing avian diversity: urban wildscapes programs. Urban Ecosystems 12(3):347-358.

Trapline Rat Boquillas


Current M.Sc. Students (chair or co-chair):

  • Kendall Aubuchon, Parameters of mountain lion kill sites
  • Lauren Cody, Small mammal communities in urban landscapes
  • Michelle Curtis, Coastal Kangaroo Rat and land use associations
  • Meagan Lobban. Nontraditional respiration in juvenile Chelydra serpentina.
  • Joey Martinez, Parasites of the intestinal tract of mongooses from Puerto Rico
  • Joey Reich, Survey of the Mexican Beaver in Big Bend National Park
  • Miranda Wait, Growth models for emydine turtles
  • Sara Weber, Golden Eagle nesting site parameters.
  • Amanda Winn, Food habits of Sable Antelope in Central Texas

 

Group 1ChuckwallaClass


Recent M.Sc. Students Supervised (chair or co-chair)

Ramirez, Lynsey. 2014. Dietary Analysis of Overwintering Populations of Brazilian
Free-tailed Bats (Tadarida brasiliensis) in Central Texas. M. Sc. Thesis.

Hominick, Meredith. 2014. Seasonal Diets of the Collared Peccary (Pecari tacaju) in the Llano Uplift Ecological Region in Texas. M. Sc. Thesis.

Andrea Julian. 2013. Bird Community Associations Across Land Cover Categories within an Urban Matrix. M. Sc. Thesis

Jacqueline Ferrato, 2013. Population density and habitat associations of the Seaside Sparrow on Laguna Atascosa National Wildlife Refuge, Cameron County, Texas. M.Sc. Thesis

Joseph Flores. 2012. Thermal Aspects of Nesting Ecology of the Texas River Cooter (Pseudemys texana) and Red-eared Slider (Trachemys scripta elegans) at Spring Lake, Hays County, Texas. M. Sc. Thesis.

Douglas Phillips. 2012. Determining Microhabitat Use by the Gulf Coast Kangaroo Rat (Dipodomys compactus) Using Motion Sensitive Cameras and Estimating Population Density at Their Northern Distribution Limit. M. Sc. Thesis.

Rachel Richter. 2012. Home Range and Habitat Use of a Reintroduced Population of Collared Peccaries in the Llano Uplift Ecoregion of Texas. M. Sc. Thesis.

Sara Weaver. 2012. Overwintering Brazilian Free-tailed Bats (Tadarida brasiliensis) in Central Texas: Baseline Population estimates and microclimate habitat analysis. M. Sc. Thesis.

Jennifer Oakley. 2012. Habitat Assessment of an Inland Population of the Gulf Coast Kangaroo Rat (Dipodomys compactus). M. Sc. Thesis.

Vanessa Pina. 2012. Changes in habitat with subsequent changes in diet of the Texas river cooter in Spring Lake, Hays County, Texas. M. Sc. Thesis.
 

Windmill Canyon Scaph