Pantherophis Fitzinger, 1843—North American Ratsnakes". in Scientific and Standard English Names of Amphibians and Reptiles of North America North of Mexico, With Comments Regarding Confidence In Our Understanding. Edition 6.1 Last updated: 24 May 2011.
ufl.edu
floridamuseum.ufl.edu
"Gray Ratsnake". Florida Snake ID Guide. Retrieved 2024-06-02.