Nerodia sipedon insularum
Varies in colour, but many individuals are brown or dark brown with faint alternating dark (sometimes reddish) horizontal banding on the back and sides.
Rocky shoreline of an island.
Conservation Status: imperiled (G5T2) (NatureServe) Imperiled. Small range on a dozen islands in western Lake Erie, with intergrades on adjacent mainland; total population size is at least a few thousand adults; has declined in distribution and abundance due to active eradication by humans and habitat loss caused by shoreline development.