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July 27, 2026Sources cited
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Science & Nature • Reptiles

Tortoise

A tortoise is a land-dwelling reptile in the family Testudinidae, within the order Testudines.

By Ethan Anderson| Reviewed by Olivia Bennett, Standards & Fact-Checking Lead| Updated July 27, 2026|2 min read| Fact-checked

A tortoise is a land-dwelling reptile in the family Testudinidae, within the order Testudines. Tortoises are distinguished by their heavy, often domed shells and adapted legs for walking on land. While not native to Canada as wild reptiles, they are familiar to Canadian readers through zoological collections, the pet trade, and conservation education.

Classification

Tortoises belong to the reptile order Testudines and the family Testudinidae. Historically, the word tortoise was sometimes used for any terrestrial turtle, but it now usually refers specifically to Testudinidae.

Physical characteristics

Tortoises typically have a hard shell, a high-domed carapace, and sturdy limbs suited for walking on land. Compared with aquatic turtles, they generally have heavier bodies and less webbing between the toes.

Habitat and distribution

Tortoises live in a wide range of terrestrial habitats, including deserts, grasslands, and tropical or subtropical environments. They are found on all major land masses except Antarctica and Australia.

Diet and behaviour

Most tortoises are herbivores, feeding on grasses, leaves, flowers, and other plant material. Many species are slow-moving and are known for long lifespans and low reproductive rates.

Conservation

Several tortoise species face pressure from habitat loss, hunting, and the wildlife trade. Conservation status varies widely across the group, with some species considered threatened or endangered.

Key facts

  • Tortoises are reptiles in the family Testudinidae.
  • All tortoises are turtles, but not all turtles are tortoises.
  • They are adapted for life on land and have heavy shells.
  • Tortoises occur on most continents, but not Antarctica or Australia.
  • Some species are highly threatened, including critically endangered and endangered taxa.
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Canadian context

Tortoises are not native to Canada as wild reptiles, but they are familiar to Canadian readers through zoological collections, the pet trade, conservation education, and comparisons with other turtles and terrapins.

Frequently asked questions

What is a tortoise?
A tortoise is a terrestrial reptile in the family Testudinidae, part of the order Testudines.
Are tortoises turtles?
Yes. Tortoises are a type of turtle, but the term usually refers to land-dwelling members of Testudinidae.
Where do tortoises live?
They live on land in habitats ranging from deserts to forests, especially in warm regions.
What do tortoises eat?
Most tortoises are herbivores and eat plant material such as grasses, leaves, and fruit.
How many species of tortoise are there?
Sources give roughly 47 to 50 living species, depending on classification.
Why are tortoises often considered slow?
Their heavy shells and land-adapted limbs make them generally slower-moving than many other reptiles.

References

  1. Encyclopaedia Britannicahttps://www.britannica.com/animal/tortoise
    Supports: Definition of tortoise as a member of family Testudinidae and historical broader usage for terrestrial turtles.
  2. Encyclopedia.comhttps://www.encyclopedia.com/environment/encyclopedias-almanacs-transcripts-and-maps/tortoises-testudinidae
    Supports: Classification, terrestrial habits, distribution, and approximate numbers of genera and species.
  3. Encyclopaedia Britannicahttps://www.britannica.com/animal/turtle-reptile
    Supports: Distinction that all tortoises are turtles, but not all turtles are tortoises; tortoises live exclusively on land.
  4. IFAWhttps://www.ifaw.org/animals/tortoises
    Supports: Terrestrial lifestyle, broad geographic distribution, and conservation context.