Tortoise

Tortoises at a glance

Need to know

• Tortoises are among the longest-lived terrestrial animals—some can live well over 150 years.
• All true tortoises belong to the family Testudinidae and are entirely land-dwelling.
• They are recognized for their domed shells and stout, elephantine legs.
• Many tortoise species are threatened due to habitat loss, illegal pet trade, and hunting.
• The Galápagos giant tortoise is the largest extant terrestrial tortoise species.

About the Tortoises

Tortoises are a diverse group of land-dwelling reptiles in the family Testudinidae, inhabiting a variety of ecosystems from arid deserts to humid forests. They are easily recognizable by their broadly domed, bony shells and sturdy, columnar legs adapted for terrestrial life. Ancient creatures, tortoises first appeared over 50 million years ago and are celebrated for their exceptional longevity—with some individuals recorded at over 180 years old.

Tortoises have become symbols of endurance, wisdom, and resilience in many cultures. Their slow-moving, deliberate lifestyle, coupled with effective defensive adaptations, allows them to outlast many environmental pressures. However, tortoises now face grave threats from habitat destruction, climate change, and wildlife trafficking, making conservation a crucial issue for their future survival.

Physical characteristics

Size: 6 cm to 135 cm (shell length), depending on species. Weight: 150 g to 417 kg. Lifespan: Average 60-80 years, some over 150 years.

• High-domed or saddle-backed shell
• Stout, elephantine legs with rough scales
• Head fully retracts into shell
• No teeth—sharp, beak-like jaws
• Clawed feet for digging and burrowing

Notable species

• Galápagos Giant Tortoise (Chelonoidis niger complex) — Vulnerable to Critically Endangered (varies by subspecies). Volcanic islands, arid lowlands, and humid highlands Regions: Galápagos Islands.
• Aldabra Giant Tortoise (Aldabrachelys gigantea) — Vulnerable. Coastal scrub, mangrove swamps, grasslands Regions: Aldabra Atoll, Seychelles.
• Indian Star Tortoise (Geochelone elegans) — Vulnerable. Dry forests, scrublands, and grasslands Regions: India, Sri Lanka, Pakistan.
• Leopard Tortoise (Stigmochelys pardalis) — Least Concern. Savannas, grasslands, bushy areas Regions: East Africa, Southern Africa, South Africa, Ethiopia, Sudan.
• Egyptian Tortoise (Testudo kleinmanni) — Critically Endangered. Desert and semiarid coastal habitats Regions: Libya, Egypt, Israel.
• African Spurred Tortoise (Centrochelys sulcata) — Endangered. Semi-arid grasslands, savannas, edges of the Sahara Regions: Sahel region, Chad, Sudan, Ethiopia, Burkina Faso, Mali.

Habitat and range

Original range: Evolved in Africa and Eurasia; radiated into islands and various continents

Current distribution: Today, tortoises are found throughout Africa, parts of Asia, southern Europe, the Americas, Madagascar, and several oceanic islands.

Preferred environments: Deserts, Arid grasslands, Scrublands, Savannas, Subtropical and tropical forests

Regions: East Africa, Southern Africa, Sahel, India, Sri Lanka, Galápagos Islands, Aldabra Atoll, Madagascar, Mediterranean Basin, Southwestern United States, Mexico

Where to see Tortoises

• Galápagos Islands — Year-round. Guided tours offer chances to observe wild Galápagos giant tortoises in their natural environment.
• Aldabra Atoll, Seychelles — May to September (dry season). Remote access; best arranged via scientific or eco-tour groups.
• Ranthambore National Park, India — March to June. Look for Indian star tortoises in scrub and grassland habitats.
• Makgadikgadi Pans, Botswana — November to March. Leopard tortoises are common during the wet season.
• Negev Desert, Israel — March to May. Spring is the best time to spot the critically endangered Egyptian tortoise.

Behavior and diet

Diet: Mainly herbivorous: grasses, leaves, flowers, fruits, some succulents; rare small animal matter (carrion) for select species.

Social structure: Primarily solitary but may congregate in favorable habitats; brief social interactions during mating season.

Communication: Visual displays (head bobbing, shell ramming), some vocalizations during mating/aggression, chemical cues (pheromones).

• Digs burrows to escape extreme heat or dryness.
• Fights for territory or mates using shell butting and biting.
• Regulates body temperature by basking and retreating to shade.
• Can survive long droughts by storing water in bladder and tissues.

Interactions with other animals

• Predatory birds (e.g., ravens, hawks) (predator): Eggs and hatchlings are vulnerable to predation by birds.
• Humans (predator): Threatened by habitat destruction, collection for pets, and hunting for meat.
• Herbivorous mammals (e.g., antelope, cattle) (competitive): Compete for scarce vegetation in arid habitats.
• Scavengers (e.g., beetles, ants) (symbiotic): Help clean tortoise burrows or process droppings.

Conservation

IUCN Red List status: Varies by species: from Least Concern to Critically Endangered

Threats

• Habitat destruction and fragmentation
• Illegal wildlife trade (pet and food markets)
• Introduction of predators (e.g., rats, pigs)
• Climate change
• Road mortality

Conservation efforts

• Strict legal protection in many countries
• Habitat restoration and fencing projects
• Captive breeding and reintroduction
• Community education and involvement
• International trade bans (e.g., CITES listings)

How to help

• Do not purchase wild-caught tortoises or turtle products.
• Support certified conservation organizations.
• Advocate for habitat protection and responsible land use.
• Report illegal wildlife trade.
• Participate in citizen science and habitat restoration projects.

Tortoises facts for kids

Tortoises are slow-moving reptiles that live on land and can live for a very long time, sometimes over 150 years! They have hard, protective shells and eat mostly plants, like grass and flowers.

• Tortoises are some of the slowest animals in the world.
• Their shells are made from their bones and grow bigger as they grow.
• Some tortoises can pull their heads and legs all the way inside their shells to hide.
• Baby tortoises hatch from eggs and are on their own right away.
• The oldest known tortoise lived to be 188 years old!

Did you know? Did you know a group of tortoises is called a 'creep'?

Watch & learn

• Giant Tortoises: World's Oldest Land Animals — BBC Earth. This BBC Earth feature follows Galápagos giant tortoises in their native habitat, exploring their behavior, survival, and unique ecology. Stunning footage and expert narration make it a must-watch for anyone fascinated by these ancient reptiles.
• Slow But Mighty: The Secret Lives of Tortoises — Smithsonian Channel. Smithsonian Channel examines the fascinating biology and conservation challenges of both giant and small tortoise species, highlighting their slow pace of life and incredible adaptations.
• Protecting the Endangered Aldabra Giant Tortoise — National Geographic WILD. National Geographic WILD showcases conservation efforts for the Aldabra giant tortoise, spotlighting their role in the ecosystem and the unique threats they face in the wild.
• The Ancient Journey of Tortoises: Nature’s Survivors — PBS Nature. Travel with PBS Nature through the evolutionary history of the tortoise family Testudinidae, revealing how these reptiles have survived mass extinctions and adapted to diverse environments.
• Tortoises of Madagascar: Surviving Against All Odds — BBC Earth. Explore BBC Earth's exploration of Madagascar’s unique tortoise species, their habitats, and the grave risks they face from habitat loss and poaching. Eye-opening footage and strong conservation messaging set this apart.