An inexpensive artificial snake hibernaculum built using readily available plumbing supplies.

Artificial snake hibernacula are anthropogenic structures used by snakes in temperate zones to survive harsh winter conditions. Artificial hibernacula can be intentionally created for various purposes including herpetoculture, research, habitat enhancement and conservation, or to offset development impacts. Here we present a design for an artificial snake hibernaculum for research use that was convenient (manually installed) and cost-effective ($91 CAD ea.). The hibernaculum was made of HDPE and ABS plumbing hardware, and measured ∼160 cm long by ∼10 cm wide. Our design was multi-chambered, descended to the groundwater table, and was modelled after the burrowing crayfish burrows used as overwinter refugia by snakes in our study area. Installation was completed using a manual soil auger in areas with soil depths of ∼115 cm. Removable components would allow easy ingress and egress of snakes, and threaded caps would facilitate monitoring via borescope camera. Dataloggers were used in 4 unoccupied hibernacula during one hibernation period, and results demonstrated that hibernacula supported a low mean air temperature and a high mean relative humidity. The hibernacula also provided a substantial buffer against extreme outside temperature and humidity. Further testing may demonstrate the suitability of our hibernaculum design for herpetoculture or conservation purposes.•Installed using a manual soil auger in areas with soil depths of ∼115 cm•Removable components allow for safe and easy ingress/egress of wild-caught or captive-reared snakes•Removable cap and simplified shape facilitate health monitoring of snakes via borescope camera.