Cottonmouths Migrate: Snake Survey Reveals Shocking Habitat Shift

Biologists at Florida's Tall Timbers Research Station are observing a remarkable change in cottonmouth snake behavior. As they rerun a snake survey from 20 years ago, comparing current findings to 2005 data, a clear pattern has emerged: cottonmouths are increasingly appearing in dry upland habitats, a departure from their typical wetland environment. This surprising shift is prompting new questions about the species' adaptability and environmental responses.

The survey involves meticulously checking the same line of 21 trap boxes used in the original study, ensuring direct data comparability. Researchers note a significant transition, with one biologist finding more cottonmouths in expected bottomland areas while another observes a higher incidence in uplands. This contrast highlights a potential habitat relocation occurring within the species.

These environmental changes are occurring against a backdrop of altered land management at Tall Timbers since 2005. Modifications to hardwood density and prescribed burn frequencies have reshaped the property's habitat structures. Scientists are treating the observed upland shift as preliminary, acknowledging that local land management could be a significant factor, but further research is needed to distinguish this from broader ecological trends affecting the cottonmouth population.