Cooperative Fish and Wildlife Research Units Program: Arkansas
Education, Research and Technical Assistance for Managing Our Natural Resources

Arkansas Staff Member

Dr. Brett Degregorio

Brett in front of a frozen waterfall at one of the many incredible Ozark Mountain study sites that the Arkansas Unit conducts research at

Unit Leader
Phone: (479) 575 - 4425
Faculty Email:
Faculty Website


I completed a B.S. in Wildlife and Fisheries Conservation at the University of Massachusetts in Amherst in 2004, a M.S. in Biology at Purdue at Fort Wayne in 2008, and a PhD in Natural Resources at University of Illinois in 2014. I worked with the Department of Defense (ERDC-CERL) for 5 years studying wildlife conservation issues on military installations all over the country before beginning my current position with the Arkansas Cooperative Research Unit in 2019. My students and I study the movement ecology, habitat use, distribution, and behavioral responses to anthropogenic disturbance, community ecology, predator prey ecology of reptiles, birds, and mammals. Many of my current projects utilize wildlife game cameras to monitor community level changes and behavioral responses to human activity or development. My work is adaptable and flexible as my research program is tailored to work closely with the needs of our state cooperators, the Arkansas Game and Fish Commission. My students and I endeavor to study wildlife issues all over the state of Arkansas. I teach several courses at the University of Arkansas in Fayetteville including Wildlife Management and Conservation in Arkansas and Conservation Biology.

Areas of Expertise

Anthropogenic Impacts, Behavioral Ecology, Predator-Prey Dynamics, Species Distribution Modeling, Urban Ecology, Wetland Ecology

Taxon Groups Studied

Carnivores, Furbearers, Gamebirds, Nongame Fish/Wildlife, Reptiles, Songbirds, Waterfowl

Research Publications Publication Date
Veon, J.T., B.A. DeGregorio, L.W. Naylor, K.J. Reinecke, B.C. Dabbert, D.W. Demarest, K.M. Hartke, and D.G. Krementz. 2023. Body mass dynamics in wintering mallards (Anas platyrhynchos) in the lower mississippi alluvial valley. Global Ecology and Conservation 41: e02368 | Download January 2023
Tetzlaff, S.J., Sperry, J.H. and DeGregorio, B.A., 2022. You can go your own way: No evidence for social behavior based on kinship or familiarity in captive juvenile box turtles. Applied Animal Behaviour Science, 248, p.105586.

| Download
February 2022
Tetzlaff, S.J., J.H. Sperry, B.A. Kingsbury, and B.A. DeGregorio. 2019. Captive-rearing duration might be more important than environmental enrichment for enhancing turtle head-starting success. Global Ecology and Conservation 20, p.e00797. | Download September 2019
Tetzlaff, S.J., Estrada, A., DeGregorio, B.A. and Sperry, J.H., 2020. Identification of Factors Affecting Predation Risk for Juvenile Turtles Using 3D Printed Models. Animals, 10(2), p.275. | Download February 2020
SNAPSHOT USA 2020: A second coordinated national camera trap survey of the United States during the COVID-19 Pandemic. 2022. Ecology. DOI: 10.1002/ecy.3775

Roland Kays1,2, Michael V. Cove2, Jose Diaz3, Kimberly Todd3, Claire Bresnan3, Matt Snider1,Thomas E. Lee, Jr.4, Seth C. Crockett4 , Anthony P. Crupi5, Katherine C.B. Weiss6,7, Helen Rowe8, Tiffany Sprague8, Jan Schipper7, Christopher A. Lepczyk9, Jean E. Fantle-Lepczyk9, Jon Davenport10, Zach Farris10, Jacque Williamson11, M. Caitlin Fisher-Reid12, Drew Rezendes12, Alexandra J. Bebko12, Petros Chrysafis13, Alex J. Jensen14, David S. Jachowski14, Katherine C. King15, Brandon McDonald15, Daniel J. Herrera16, Marius van der Merwe17, Robert V. Horan III19, Michael S. Rentz20, LaRoy S.E. Brandt21, Christopher Nagy22, Sean P. Maher24, Andrea K. Darracq25, George Hess3, Matthew E. Gompper26, Stephen L. Webb27, John P. Vanek28, Diana J. R. Lafferty29, Tru Hubbard29, Jorie Favreau31, Jack Fogarty31, Steven Hammerich33, Michelle Halbur33, Morgan Gray33, Christine C. Rega-Brodsky34, Caleb Durbin34, Elizabeth A. Flaherty35, Jarred Brooke35, Stephanie S. Coster36, Richard G. Lathrop37, Katarina Russell37, Daniel A. Bogan38, Hila Shamon1, Robert C. Lonsinger42, M. Teague O'Mara43, Justin A. Compton44, Melinda Fowler44, Erika L. Barthelmess45, Katherine E. Andy45, Jerrold L. Belant46, Dean E. Beyer, Jr.47, Daniel G. Scognamillo48, Chris Schalk48, Caroline N. Ellison50, Chip Ruthven50, Sarah Fritts51, Jaquelyn Tleimat51, Mandy Gay51, Christopher A. Whittier52, Sean A. Neiswenter53, Robert Pelletier53, Brett A. DeGregorio54, Erin K. Kuprewicz55, Miranda L. Davis55, Carolina Baruzzi57, Marcus A. Lashley56, David Mason56, Derek R. Risch58, Maximilian L. Allen59,60, Laura S. Whipple60, Jinelle H. Sperry61, Patrick Wolff61, Robert H. Hagen62, Alessio Mortelliti63, Amay Bolinjcar63, Marketa Zimova68, Sean T. Giery70, Summer D. Higdon72, Ronald S. Revord72, Christopher P. Hansen73, Joshua J. Millspaugh73, Adam Zorn74, Nathaniel H. Wehr75, Brian D. Gerber77, Kylie Rezendes77, Jessie Adley77, Jennifer Sevin78, Austin M. Green79, Çağan H. Şekercioğlu79,80, Mary E. Pendergast81, Kayleigh Mullen81, Tori Bird81b, Andrew J. Edelman82, Tim Hawig82, Joanne R. Wasdin82, Andrea Romero83, Brian J. O'Neill83b[KR1] , Noel Schmitz83b, Rebecca A Vandermus83, Jesse M. Alston84, Kellie M. Kuhn85, Damon B. Lesmeister86, Cara L. Appel87, Christopher Rota88, Jennifer L. Stenglein89, Christine Anhalt-Depies89, Carrie Nelson90, Robert A. Long91, Paula MacKay91, Kathryn R. Remine91, Mark J. Jordan92, Mark Elbroch93, Dylan Bergman94, Sara Cendejas-Zarelli95, Kim Sager95, Haydée Hernández-Yáñez3, William J. McShea3

| Abstract | Download
April 2022
Ruther, E.V., M Asher, G. Christie, C. Gale, A. Massey, C. Massery, C.R. Middaugh, J. Veon, and B.A. DeGregorio. 2021. Northern Bobwhite Occupancy Patterns on Multiple Spatial Scales Across Arkansas. Journal of Fish and Wildlife Management 12: 502-512 | Download December 2021
Deshwal, A., R. Kannan, S. L. Stephenson, J. D Willson, B. DeGregorio, and P. Panwar. 2022 Importance of Microhabitat Guilds for Conservation of Scrubland Birds in the Eastern Ghats of India. Ecology and Evolution: 1-12: | Download July 2022
DeGregorio, Wolff, and Rice. 2021. Evaluating hydrophones for detecting underwater-calling frogs: implications for monitoring imperiled species. Herpetological Conservation and Biology 16(3):513–524. | Download December 2021
DeGregorio, B.A., Veon, J.T. and Massey, A., 2022. Wildlife associates of nine‐banded armadillo (Dasypus novemcinctus) burrows in Arkansas. Ecology and Evolution, 12(5), p.e8858. | Download June 2022
DeGregorio, B.A., J.D. Willson, and A. Massey. Assessing the density, demography, and resilience to commercial harvest of aquatic turtles in the Mississippi Delta region of Arkansas. Arkansas Game and Fish Commission Final Report | Abstract March 2022
DeGregorio, B.A., C. Gale, E. Lassiter, A. Massey, C. Roberts, and J. Veon. 2021. Nine-banded Armadillo (Dasyrus novemcinctus) Activity Patterns are Influenced by Human Activity. Ecology and Evolution: 0-8. | Abstract | Download November 2021
Cove, M. V., R. Kays, H. Bontrager, C. Bresnan, M. Lasky, T. Frerichs, R. Klann, T. E. Lee Jr., S. C. Crockett, A. P. Crupi, K. C. B. Weiss, H. Rowe, T. Sprague, J. Schipper, C. Tellez, C. A. Lepczyk, J. E. Fantle‐Lepczyk, S. LaPoint, J. Williamson, M. C. Fisher‐Reid, S. M. King, A. J. Bebko, P. Chrysafis, A. J. Jensen, D. S. Jachowski, J. Sands, K. A. MacCombie, D. J. Herrera, M. van der Merwe, T. W. Knowles, R. V. Horan III, M. S. Rentz, L. S. E. Brandt, C. Nagy, B. T. Barton, W. C. Thompson, S. P. Maher, A. K. Darracq, G. Hess, A. W. Parsons, B. Wells, G. W. Roemer, C. J. Hernandez, M. E. Gompper, S. L. Webb, J. P. Vanek, D. J. R. Lafferty, A. M. Bergquist, T. Hubbard, T. Forrester, D. Clark, C. Cincotta, J. Favreau, A. N. Facka, M. Halbur, S. Hammerich, M. Gray, C. C. Rega‐Brodsky, C. Durbin, E. A. Flaherty, J. M. Brooke, S. S. Coster, R. G. Lathrop, K. Russell, D. A. Bogan, R. Cliché, H. Shamon, M. T. R. Hawkins, S. B. Marks, R. C. Lonsinger, M. T. O'Mara, J. A. Compton, M. Fowler, E. L., K. E. Andy, J. L. Belant, D. E. Byer Jr., T. M. Kautz, D. G. Scognamillo, C. M. Schalk, M. S. Leslie, S. L. Nasrallah, C. N. Ellison, C. Ruthven, S. Fritts, J. Tleimat, M. Gay, C. A. Whittier, S. A. Neiswenter, R. Pelletier, B. A. DeGregorio, E. K. Kuprewicz, M. L. Davis, A. Dykstra, D. S. Mason, C. Baruzzi, M. A. Lashley, D. R. Risch, M. R. Price, M. L. Allen, L. S. Whipple, J. H. Sperry, R. H. Hagen, A. Mortelliti, B. E. Evans, C. E. Studds, A. P. K. Sirén, J. Kilborn, C. Sutherland, P. Warren, T. Fuller, N. C. Harris, N. H. Carter, E. Trout, M. Zimova, S. T. Giery, F. Iannarilli, S. D. Higdon, R. S. Revord, C. P. Hansen, J. J. Millspaugh, A. Zorn, J. F. Benson, N. H. Wehr, J. N. Solberg, B. D. Gerber, J. C. Burr, J. Sevin, A. M. Green, Ç. H. Şekercioğlu, M. Pendergast, K. A. Barnick, A. J. Edelman, J. R. Wasdin, A. Romero, B. J. O'Neill, N. Schmitz, J. M. Alston, K. M. Kuhn, D. B. Lesmeister, M. A. Linnell, C. L. Appel, C. Rota, J. L. Stenglein, C. Anhalt‐Depies, C. Nelson, R. A. Long, K. J. Jaspers, K. R. Remine, M. J. Jordan, D. Davis, H. Hernández‐Yáñez, J. Y. Zhao, and W. J. McShea. 2021. Snapshot USA: the first coordinated national camera trap survey of the United States – data from 2019. Ecology. Online early. | Abstract | Publisher Website April 2021
DeGregorio, B.A., J.H. Sperry, and P.J. Weatherhead. 2021 Factors Influencing the Use of Water-filled Tree Cavities by Eastern Ratsnakes (Pantherophis alleghaniensis). Herpetological Conservation and Biology 16(1):173-182. | Download April 2021
Ellery, Lassiter

Johansson, Emily

McTigue, Leah

Shaw, Michael

Wilson, Kenneth

Presentations Presentation Date
Wolff, P.J., B.A. DeGregorio, and J.D. Willson. Demonstration of a novel method for estimating the density of secretive snakes. SERDP-ESTCP Symposium, Dec 3-5 2019. December 2019
Wolff, P.J., B.A. DeGregorio, and A. Rice. Demonstration of Subsurface Passive Acoustic Monitoring (SPAM) to Survey for Underwater-Calling Frogs. SERDP-ESTCP Symposium, Dec 3-5 2019. December 2019
Veon, J.V., B.A. DeGregorio, L Naylor, and D.G. Krementz.2022. Body mass dynamics in wintering mallards in the Lower Mississippi Alluvial Valley. Lower Mississippi Joint Venture Annual Conference. October 2022
Veon, J., B.A. DeGregorio, D.G. Krementz, and L. Naylor. 2021. Trends in Mallard Body Mass in the Mississippi Alluvial Valley 1979-2021. The Wildlife Society Annual Conference. November 2021
Veon, J. and B.A. DeGregorio. Habitat management for overwintering mallards: is it effective? March 2020
Tetzlaff, S.J., E. Astrada, B.A. DeGregorio, and J.H. Sperry. 3D Printed Models Aid in Identifying Factors Affecting Predation Risk for Juvenile Box Turtles July 2019
Tetzlaff, S.J., B.A. Kingsbury, J.H. Sperry, and B.A. DeGregorio. Effects of environmental enrichment on translocation success for eastern box turtles. SERD-ESTCP Annual Symposium, DoD. Washington, DC Dec 2-5, 2019. December 2019
Spotted turtle (Clemmys guttata) movement patterns in an urbanized landscape. Lassiter, E.V., B.A. DeGregorio, and J.H. Sperry. 2020. Arkansas Chapter of the Wildlife Society March 2020
Shaw, M.S., Roberts, C., and B.A. DeGregorio. 2022. A Habitat Suitability Model for the Plains Spotted Skunk. The Wildlife Society Annual Conference, Spokane, WA. November 2022
Ruther, E.V., J.H. Sperry, and B.A. DeGregorio. Regional Trends in Spotted Turtle Movement July 2019
Ruther, E.V., J.H. Sperry, and B.A. DeGregorio. Regional Trends in Spotted Turtle (Clemmys guttata) Movement Patterns October 2019
Ruther, E.V., B.A. DeGregorio, and J.H. Sperry. 2020. <b>Drivers of Spotted Turtle (Clemmys guttata) Movement and Space Use in an Urbanized Landscape</b> September 2020
Northern Bobwhite Occupancy Patterns on Multiple Spatial Scales. 2022. Ellery Lassiter, John Veon, Chris Middaugh, Andrhea Massey, Marcus Asher, Cody Massery, Grace Christie, Connor Gale, and Brett DeGregorio. Wildlife Society Annual Conference, Spokane, WA. November 2022
Northern Bobwhite Occupancy Patterns on Multiple Spatial Scales Across Arkansas. 2022. Ellery Lassiter, John Veon, Chris Middaugh, Andrhea Massey, Marcus Asher, Cody Massery, Grace Christie, Connor Gale, and Brett DeGregorio. Arkansas Chapter of the Wildlife Society Annual Conference. March 2022
Mctigue, L. and B.A. DeGregorio. 2022. Mesocarnivore density along an urban to rural gradient. The Wildlife Society Annual Conference. Spokane, WA. November 2022
McTigue, L.E. and B.A. DeGregorio. 2023. Effects of Landcover on Mesocarnivore Density Along an Urban to Rural Gradient. March 2023
Lassiter, E.R., J.H. Sperry, and B.A. DeGregorio. 2019. Why did the turtle cross the wetland? Poster Presentation - Spotted, Blanding's and Wood Turtle Symposium. November 2019
Johansson, E.P. and B.A. DeGregorio. Suburban Wildlife Management in Northwest Arkansas. 2022. The Wildlife Society Annual Conference. November 2022
Johansson, E.P. and B.A. DeGregorio. 2023. The Effects of Landscape and Yard Features on Mammals in Residential Yards. Arkansas Chapter of the Wildlife Society Annual Conference March 2023
Donahue, E., A.J. Worm, B.A. DeGregorio, L. Neuman-Lee, and T. Boves. 2022. High Prevalence of Neonicotinoid Residues in a Declining Predatory Songbird, the Loggerhead Shrike, in Arkansas, USA. Association of Field Ornithologists. October 2022
Does the Human Shield Hypothesis explains patterns of Virginia Opossum occupancy, abundance, and activity? 2022. John Veon, Ellery Lassiter, Emily Johansson, Michael Shaw, Leah McTigue, Andrhea Massey, Rylee Gibson, and Brett DeGregorio. Arkansas Chapter of the Wildlife Society Annual Conference. March 2022
DeGregorio, B.A. 2022. Working with state cooperators. South East Region Science Meeting. Online. July 2022
DeGregorio, B.A. 2022. Mesopredator co-existence with humans. Presentation to NSF REU Program Orientation. June 2022
Christie, G.H., and B.A. DeGregorio. 2020. Changes in Northern Bobwhite occupancy and distribution across Arkansas. The Wildlife Society Annual Conference. Louisville September 2020
Christie, G.H. and B.A. DeGregorio. 2002. Changes in Northern Bobwhite occupancy and distribution across Arkansas. North American Ornithological Conference, Puerto Rico. August 2020
B.A. DeGregorio. 2022. Developing and maintaining cooperator relationships. New Scientist Orientation. Denver, CO. August 2022
B.A. DeGregorio, S.J. Tetzlaff, B.A. Kingsbury, and J.H. Sperry. Does Environmental Enrichment Improve Head Starting for Eastern Box Turtles? October 2019
Asher, M. B.A. DeGregorio, E.V. Ruther, C. Middaugh, J. Veon, A. Massey, C. Massery, G. Christie, and C. Gale. 2021. Bobwhite Occupancy on Multiple Spatial Scales. Presentation to the Bobwhite Technical Committee. August 2021
Technical Publications Publication Date
B.A. DeGregorio, J.H. Sperry, and B.A. Kingsbury. Transferring "translocation science" to wildlife conservation on DoD installations: demonstration of environmental enrichment and soft release technology. 2019. Report ID: RC201616. DoD SERDP-ESTCP program. | Download April 2019