| Sequence-based molecular phylogenetics and phylogeography of the American box turtles (Terrapene spp.) with support from DNA barcoding BT Martin, NP Bernstein, RD Birkhead, JF Koukl, SM Mussmann, ... Molecular Phylogenetics and Evolution 68 (1), 119-134, 2013 | 57 | 2013 |
| Patterns of folivory and seed ingestion by gopher tortoises (Gopherus polyphemus) in a southeastern pine savanna RD Birkhead, C Guyer, SM Hermann, WK Michener The American Midland Naturalist 154 (1), 143-151, 2005 | 39 | 2005 |
| Contrasting signatures of introgression in North American box turtle (Terrapene spp.) contact zones BT Martin, MR Douglas, TK Chafin, JS Placyk Jr, RD Birkhead, CA Phillips, ... Molecular Ecology 29 (21), 4186-4202, 2020 | 26 | 2020 |
| The effect of body size on cottonmouth (Agkistrodon piscivorus) survival, recapture probability, and behavior in an Alabama swamp DN Koons, RD Birkhead, SM Boback, MI Williams, MP Greene Herpetological Conservation and Biology 4 (2), 221-235, 2009 | 19 | 2009 |
| Range-wide and regional patterns of population structure and genetic diversity in the Gopher Tortoise D Gaillard, JR Ennen, BR Kreiser, CP Qualls, SC Sweat, R Birkhead, ... Journal of Fish and Wildlife Management 8 (2), 497-512, 2017 | 17 | 2017 |
| The choices we make and the impacts they have: Machine learning and species delimitation in North American box turtles (Terrapene spp.) BT Martin, TK Chafin, MR Douglas, JS Placyk Jr, RD Birkhead, CA Phillips, ... Molecular ecology resources 21 (8), 2801-2817, 2021 | 15 | 2021 |
| Mitochondrial DNA assessment of the phylogeography of the gopher tortoise JR Ennen, BR Kreiser, CP Qualls, D Gaillard, M Aresco, R Birkhead, ... Journal of Fish and Wildlife Management 3 (1), 110-122, 2012 | 15 | 2012 |
| On the Reclassification of the Terrapene (Testudines: Emydidae): A Response to Fritz & Havaš BT Martin, NP Bernstein, RD Birkhead, JF Koukl, SM Mussmann, ... Zootaxa 3835 (2), 292–294-292–294, 2014 | 10 | 2014 |
| The effects of isolation on the demography and genetic diversity of long-lived species: implications for conservation and management of the gopher tortoise (Gopherus polyphemus) JR Ennen, RD Birkhead, BR Kreiser, DL Gaillard, CP Qualls, JE Lovich Herpetological Conservation and Biology 6 (2), 202-214, 2011 | 10 | 2011 |
| Ingestion of seeds by gopher tortoises (Gopherus polyphemus) in a southeastern pine savanna: species composition and effects on germination RD Birkhead Auburn University, 2001 | 7 | 2001 |
| Gopher tortoise, Gopherus polyphemus R Birkhead, TD Tuberville The Amphibians and Reptiles of Georgia. University of Georgia Press. Athens, GA, 2008 | 6 | 2008 |
| GEOGRAPHIC DISTRIBUTION: CAUDATA RN Williams, BJ MacGowan, RD Birkhead, VM Johnson Herpetological Review 35 (3), 279, 2004 | 6 | 2004 |
| Differences in fluctuating asymmetry among four populations of Gopher tortoises (Gopherus polyphemus) JM Goessling, K Rebois, JC Godwin, R Birkhead, CM Murray, ... Herpetological Conservation and Biology 12 (2), 548-555, 2017 | 4 | 2017 |
| Effects of tracked-vehicle training activity on gopher tortoise (Gopherus polyphemus) behavior at Fort Benning, GA. ERDC C Guyer, R Birkhead, H Balbach CERL TR-06-10/ADA467989, Champaign, IL: Engineer Research and Development …, 2006 | 4 | 2006 |
| Machine learning substantiates biologically meaningful species delimitations in the phylogenetically complex North American box turtle genus Terrapene BT Martin, TK Chafin, MR Douglas, JS Placyk Jr, RD Birkhead, CA Phillips, ... bioRxiv, 2020.05. 19.103598, 2020 | 3 | 2020 |
| Differential introgression reveals thermal adaptation and candidate genes shaping species boundaries in North American box turtles (Terrapene spp.) BT Martin, MR Douglas, TK Chafin, JS Placyk Jr, RD Birkhead, CA Phillips, ... bioRxiv, 752196, 2019 | 3 | 2019 |
| One hundred two new county records for amphibians and reptiles in Alabama, USA B FOLT, D LAURENCIO, JM GOESSLING, RD BIRKHEAD, J STILES, ... Herpetological Review 46 (4), 591-594, 2015 | 3 | 2015 |
| Bringing global climate change education to Alabama high-school classrooms MK Lee, M Simon, K Fielman, L Marzen, Y Lin, R Birkhead, C Miller, ... Handbook of climate change mitigation, 1983-2028, 2012 | 3 | 2012 |
| The cottonmouth condo: a novel venomous snake transport device RD Birkhead, MI Williams, SM Boback, MP Greene Herpetological Review 35 (2), 153, 2004 | 3 | 2004 |
| Natural history notes JD CAMPER Herpetological Review 47, 2, 2016 | 2 | 2016 |
John S. Placyk, Jr.Trinity Valley Community CollegeVerified email at tvcc.edu