Several species of amphibians and reptiles reach their northern range limit in south Texas, USA. Herpetological research in the area, as well as frequent visits from amphibian and reptile enthusiasts, have helped to form a more complete understanding of amphibian and reptile distributions across the region. However, gaps in the recognized distribution of many species remain. Efforts to better document species occurrence are confounded by the lack of public land and the fact that most of south Texas is privately owned, making access to suitable habitat difficult (Schmidly et al. 2001)
Guadiana, Clinton, Padraic S. Robinson, Matthew Schalk, and Drew R. Davis. 2020. “New County Records of Amphibians and Reptiles from South Texas, USA.” Herpetological Review 51 (December): 799–803.