Land tortoises are pets of exceptional longevity — they can exceed 80-100 years in captivity — and yet they are also among the most poorly cared for due to lack of knowledge. Their apparent hardiness leads many owners to underestimate them, when in reality they need very specific conditions of temperature, ultraviolet light, nutrition and space to stay healthy. A properly cared-for tortoise can accompany several generations of the same family.
Most Common Species in Spain
In Spain, the most common land tortoises kept as pets are:
- Spur-thighed tortoise (Testudo graeca): native to the Mediterranean basin, it is protected by Spanish and European legislation (CITES Appendix II). Only specimens with documentation proving legal origin (captive bred) may be kept. Adult size: 15-20 cm. Very resistant to extreme temperatures.
- Hermann's tortoise (Testudo hermanni): similar to the spur-thighed, also protected. Distinguished by a divided supracaudal scale and a horny protuberance at the tip of the tail.
- Horsfield's tortoise (Agrionemys horsfieldii): from Central Asia, somewhat smaller. Tolerates very low temperatures and undergoes deep hibernation.
- Sulcata (Centrochelys sulcata): the third largest land tortoise in the world. Can exceed 70 kg. Requires a large garden with a warm zone and does not tolerate cold. Not suitable for apartments.
Important: in Spain it is illegal to buy or sell protected tortoises without CITES documentation. Always request the captive birth certificate.
Habitat: UV Light and Temperature Are Non-Negotiable
The most serious error in tortoise care is the lack of ultraviolet (UVB) light. Without UVB, tortoises cannot synthesize vitamin D3, which prevents calcium absorption and causes metabolic bone disease (MBD): shell deformities, soft bones and premature death.
For indoor tortoises you need:
- High-powered UVB lamp (T5 HO tube, 10.0 or 12%, Arcadia or Zoo Med brand). Must be replaced every 12 months even if it still lights up, because UVB emission decreases before visible light does.
- Heat bulb: basking zone at 35-40°C directly under the bulb. Cool zone at 20-25°C.
- Light cycle: 12-14 hours of light in summer, 10 hours in winter. Never artificial light for 24 hours.
For outdoor tortoises: access to direct sunlight (no glass, which filters UVB), shaded area, secure enclosure against predators and escape from below (tortoises dig), and shelter for cold nights.
Diet: Primarily Fibrous Vegetables
Mediterranean tortoises are herbivores that prefer wild plants. Their ideal diet includes:
- Wild plants and herbs: dandelion, chicory, plantain, mallow, clover, field herbs. These are the most nutritionally appropriate base.
- Dark leafy vegetables: escarole, endive, lamb's lettuce. Avoid excess spinach and beetroot (oxalates).
- Flowers: hibiscus, mallow, pansies (Viola). Provide variety and palatability.
- Avoid: fruits (too much sugar), tomato, iceberg lettuce, animal-origin foods, excess protein (causes kidney damage and pyramidal shell growth).
Calcium supplementation (calcium carbonate powder or cuttlebone always available) is essential. Vitamin D3 does not need supplementation if UVB is adequate.
Hibernation: How to Do It Right
Mediterranean tortoises hibernate in nature between November and March. In captivity this cycle should be respected. A tortoise that does not hibernate for years can develop reproductive and metabolic problems.
The correct process includes: stopping feeding 4-6 weeks before, warm baths to empty the intestine, gradual temperature reduction and housing in a hibernation box (soil and cork mix) at 4-8°C. Temperature must never fall below 2°C (risk of death) or exceed 10°C (the animal wakes up and uses reserves without being able to eat).
