Reptiles

Box Turtle

Terrapene · also called box tortoise

Vulnerable ↓ omnivore Temperate forest Temperate grassland Rivers & wetlands

A box turtle is a pond turtle that moved onto land and then, for defence, learned to shut itself into a box. A hinge across its lower shell lets it fold the front and back up tight against the dome above, sealing the animal completely inside with no opening for a predator to work at. It may do this in the same few hectares of woodland for a century.

Overview

Box turtles are the genus Terrapene, small land turtles of the eastern and central United States and northern Mexico, in the pond turtle family rather than the tortoise family. They are omnivores of woodland, meadow, and prairie, eating worms and insects when young and more fruit, leaves, and mushrooms as adults. They can safely eat mushrooms toxic to humans, and the poison can build up in their flesh.

The box

The plastron has a flexible hinge across the middle. By withdrawing head, legs, and tail and pulling both halves up against the dome, the turtle seals itself into a closed box that a fox or raccoon usually cannot force. Hatchlings cannot fully close until the hinge develops.

A lifelong home

A box turtle typically spends its whole life within a few hectares, navigating by memory to the same shelters and hibernation sites. A turtle moved even a kilometre away will wander for years trying to get home, which is why relocating one — or taking it as a pet — is so damaging.

Status

Box turtles are assessed as Vulnerable, trend decreasing. The eastern and ornate box turtles are both declining across the US from road mortality, pet-trade collection, habitat loss, and heavy nest predation, and the Coahuilan box turtle of one Mexican wetland is Endangered. Maturing at ~10 years with small clutches, their populations recover very slowly.

Box Turtle: common questions

Is a box turtle a turtle or a tortoise?

A box turtle is a turtle, a member of the pond turtle family Emydidae, even though it lives on land like a tortoise. True tortoises are a separate family, Testudinidae, with high domed shells, stumpy elephant-like legs, and a fully terrestrial life. Box turtles evolved a land lifestyle within the pond turtle family, and they keep some pond turtle traits, including slightly webbed feet, a taste for damp conditions and soaking in shallow water, and the ability of hatchlings to swim. So a box turtle is best thought of as a pond turtle that moved onto land, not as a tortoise. The alternative name box tortoise is a folk usage.

How does the box turtle's shell close?

The lower shell, or plastron, of a box turtle is divided into a front lobe and a back lobe joined by a flexible hinge of connective tissue running across the middle. Strong muscles let the turtle pull each lobe upward and inward, pressing its edges tightly against the rim of the domed upper shell. Once the head, all four legs, and the tail are withdrawn, the turtle is fully enclosed in a sealed box with no opening, and the fit is close enough that a predator such as a fox, raccoon, or dog usually cannot get a purchase to force it open. Young box turtles cannot close up fully until the hinge develops at a few years old.

Why should you not take a box turtle home or move it far?

Box turtles are deeply tied to a specific patch of ground, usually just a few hectares, and they navigate it by memory, returning to the same burrows, feeding areas, and hibernation spots for decades. A turtle removed from its home range and released elsewhere does not settle; it spends months or years wandering in an often futile attempt to return, crossing roads and unfamiliar territory and frequently dying in the process. Taking box turtles for pets has been a major driver of their decline, since each removed adult is a breeding animal lost from a slow-growing population. If you find a healthy box turtle crossing a road, the right action is to move it a short distance to the side it was heading and leave it there.

How can you tell a box turtle's age or sex?

Age cannot be read reliably from a box turtle. Young turtles add visible growth rings to the shell scutes, roughly one a year, but these become crowded, worn, and unreliable after 15 to 20 years, and a very old box turtle often has a smooth, featureless shell. Sex is easier in adults of the eastern box turtle, where males typically have bright red or orange eyes, a longer, thicker tail, a slightly concave plastron, and more colourful markings, while females have yellowish or brown eyes, a shorter tail, and a flat plastron. In the ornate box turtle the eye-colour difference is less pronounced and other features are used.

Sources & further reading

Written by HideShark Editorial Team · reviewed by HideShark Science Desk. Published September 10, 2026. Last updated September 10, 2026.

Quick facts

Scientific name: Terrapene
Diet: A true omnivore that shifts with age, with young box turtles more carnivorous, eating earthworms, slugs, snails, insects, and grubs, and adults taking more plant matter, including berries, mushrooms, fallen fruit, leaves, and flowers, along with carrion
A shell that closes like a box: A box turtle's lower shell, the plastron, has a flexible hinge across the middle, and by drawing in its head, legs, and tail and pulling the front and back halves of the plastron up tight against the domed upper shell, the turtle seals itself into a closed box that almost no predator can open
They eat toxic mushrooms and store the poison: Box turtles can eat mushrooms that are deadly to humans without ill effect, and the toxins can accumulate in the turtle's flesh, so historically people who ate box turtle meat sometimes suffered mushroom poisoning from the turtle itself
A lifelong home range: An individual box turtle usually lives its entire life within a home range of only a few hectares, often less, returning to the same shelters, feeding spots, and hibernation sites year after year, which is why a turtle moved even a kilometre away will often wander for years trying to get back
The nest temperature sets the sex: Like most turtles, box turtles have temperature-dependent sex determination, with cooler nests around 22 to 27 degrees Celsius producing mostly males and warmer nests around 28 to 30 producing mostly females
Very long-lived: Box turtles routinely live 30 to 50 years, many pass 80, and there are credible records of individuals over 100, sometimes identified by dates and initials carved into the shell by earlier generations, a practice that is now discouraged because it can lead to shell infection
A slow-motion decline: Box turtles are collected for the pet trade, killed on roads in large numbers, and lose habitat to development and farming, and because they mature at around 10 years, lay small clutches, and suffer heavy nest predation, populations that start to fall are extremely slow to recover
Range: The eastern and central United States and northern Mexico, in deciduous and mixed woodland, woodland edge, meadows, floodplains, and tallgrass prairie for the ornate box turtle, generally in areas with loose soil for nesting and hibernation, leaf litter and logs for shelter, and shallow water or damp ground to soak in during hot weather.
Conservation status: Vulnerable ↓ ≈ The eastern box turtle and the ornate box turtle are both assessed as Vulnerable and declining across the United States, and the Coahuilan box turtle of a single Mexican wetland is Endangered, with the main pressures being road mortality, collection for the domestic and international pet trade, loss and fragmentation of the woodland and prairie the turtles need, and heavy predation of nests by raccoons, skunks, and other subsidised predators around human settlement in the wild