Transporting a water snake by car requires careful preparation to ensure the animal's safety and minimize stress during the journey. The most important consideration is a secure, escape-proof transport container. A sturdy plastic container with a tight-fitting lid and ventilation holes drilled along the upper sides is the standard choice among experienced keepers. The container should be large enough for the snake to coil comfortably but small enough to limit excessive movement during transit. A damp cloth or moistened paper towels placed inside the container help maintain the humidity levels that water snakes require.
Temperature management during car travel is critical, as water snakes are ectotherms that rely on external heat sources to regulate their body temperature. In cold weather, a chemical hand warmer wrapped in a towel and placed near but not inside the container can prevent dangerous temperature drops. In warm weather, the car's air conditioning should be used to prevent overheating, and the container should never be left in direct sunlight or in an unattended vehicle. Extreme temperatures can be fatal to reptiles within minutes, and water snakes are no exception.
For longer drives, plan the route with the snake's needs in mind. Minimize stops that require leaving the vehicle unattended, and if stops are necessary, take the transport container with you rather than leaving it in the car. Avoid playing loud music or making sudden driving maneuvers that could jostle the container and stress the animal. Keeping the container on the floor of the back seat, secured so it cannot slide or tip over, provides the most stable ride.
Water snakes are known for being more active and defensive than many commonly kept snake species, so it is advisable to handle the snake as little as possible during transit. Place the snake in the transport container before departing and leave it undisturbed until you reach your destination. If the journey will take more than a few hours, a brief check to ensure the snake is not in distress is reasonable, but avoid opening the container in the vehicle where an escape could create a dangerous distraction for the driver.