Russian tortoises require a period of hibernation (brumation) to maintain health and normal life cycles. Hibernation typically lasts 3-5 months, but only healthy tortoises with adequate fat reserves should hibernate.
To hibernate your Russian tortoise safely, you must gradually reduce temperatures and daylight over 2-3 weeks, then maintain a stable temperature of 40-50°F (4-10°C) with humidity around 50-70%. Never allow freezing or temperatures above 50°F (10°C) during hibernation.
Pre-Hibernation Health Check and Preparation
Only healthy Russian tortoises with good body weight and no signs of illness should hibernate. A tortoise that is underweight, sick, or injured should not hibernate. We recommend a veterinary check before hibernation, including a fecal exam for parasites.
To prepare, stop feeding 2-3 weeks before hibernation to allow the gut to empty, but continue providing water. Gradually reduce temperatures and light exposure over 2-3 weeks to mimic seasonal changes. The tortoise should stop eating and become less active.
Temperature and Humidity During Hibernation
Russian tortoises hibernate best at temperatures between 40-50°F (4-10°C). Temperatures above 50°F (10°C) may cause the tortoise to wake prematurely and burn energy. Temperatures below freezing can be fatal. Use a reliable thermometer in the hibernation area.
Humidity should be maintained between 50-70%. Too dry can cause dehydration; too wet can promote respiratory infections. A substrate like soil or aspen shavings can help maintain humidity. Check the tortoise weekly for weight loss or signs of illness.
Duration and Monitoring of Hibernation
Hibernation for Russian tortoises typically lasts 3-5 months. Shorter or longer periods can be risky. Weigh your tortoise before and during hibernation; a loss of more than 10% of body weight is a cause for concern and may require waking the tortoise.
Monitor the tortoise weekly by gently checking for movement. The tortoise should be unresponsive but not stiff, and the eyes should be closed. If there is discharge from the nose or eyes, or any sign of illness, seek veterinary advice immediately.
Waking Up and Post-Hibernation Care
To wake your Russian tortoise, gradually raise the temperature over several days and increase daylight hours. Place the tortoise back in its enclosure with access to water. Offer food only after the tortoise is fully active and has had a warm soak.
After hibernation, the tortoise may be dehydrated. Soak it in shallow, warm water for 15-20 minutes daily for the first week. Offer a varied diet of dark leafy greens and weeds. Monitor for any signs of illness and resume normal care gradually.
Common Hibernation Mistakes and Risks
One common mistake is hibernating a tortoise that is too young or too small. Russian tortoises should be at least 3-4 years old and have a body weight over 100 grams before hibernation. Another mistake is allowing temperatures to fluctuate, which can cause the tortoise to wake and then re-enter hibernation, depleting energy reserves.
Risks include respiratory infections, dehydration, and sudden death. To minimize risks, never hibernate a tortoise that is sick or underweight. Always provide a stable environment and monitor regularly. If in doubt, consult a reptile veterinarian.