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Three-Toed Box Turtle Species Profile: Habitat, Diet, Size, and Lifespan

(Terrapene carolina triunguis)

The three-toed box turtle (Terrapene carolina triunguis) is a subspecies of the eastern box turtle commonly found in the central and southern United States. Known for its domed shell and the ability to completely close its shell for protection, this turtle thrives in forests, grasslands, and moist environments. This species profile explores the three-toed box turtle’s natural habitat, diet, size, lifespan, and interesting facts about this unique reptile.

Check out the Three Toed Care Sheet I made if you think this Box Turtle is for you. Three Toed Box Turtle Care Guide.

“Three-toed box turtle (Terrapene carolina triunguis) standing on a sunlit log in an outdoor enclosure, facing the camera with its head raised.”
“A three-toed box turtle pauses on a log in the sun—its upright stance and curious gaze highlight this subspecies’ inquisitive nature.”

Here is a list of all the care guides I made, more to be added

View All Care Guides

Quick Facts

Scientific Name:Terrapene carolina triunguis
Common Name(s):Three-toed box turtle
Family / Taxonomy:Emydidae
Native Range / Distribution:Central and southern United States—primarily Missouri, Arkansas, Oklahoma, Texas, and surrounding states
Habitat:Moist woodlands, prairies, and areas near streams or ponds
Adult Size:4–6.5 in (10–16.5 cm) shell length
Lifespan:40–60+ years
Conservation Status:Not listed globally but protected or regulated in several states

Identification

  • Shell: High domed, hinged bottom shell to “box up”, Shell is a Olive, borwn or tan color. They stay fairly small at 4″-6.5″.
  • Key Feature: Three toed box turtles usually only have three toes on the back foot. This unique feature gives them their common name however some three toed box turtles have four toes.
  • Head & Limbs: Males can have yellow, red, orange and even white on the head and limbs. These features are for breeding purposes and can be very bright. Females can also have very color face and limbs but often are a lot less vibrant.
  • Sexual Dimorphism: Males tend to have red eyes, concaved plastron, as well as a longer thinner tail. Females tend to have brown eyes, flat bottom shell, and short stubby tails.

If you feel like these identification features don’t fit your pet turtle or tortoise, check out the Species Profile Hub for other specie profiles.

Natural Behavior & Habits

  • Prefers– slightly wetter habitats than some other box turtle subspecies. Shallow ponds with leaf litter close by make a great habitat.
  • Hydration- Proper hydration is important for reptiles kept in captivity. Learn more about hydration and routine care in our guide on tortoise soaking benefits.
  • Omnivorous—Three-toed box turtles are omnivores and eat a variety of foods including insects, fruits, and vegetation. For more information about safe foods, see our guide on Tortoise & Turtle Feeding List.
  • Hibernate (brumate) underground in colder months.
  • Breeding: Spring through early summer; females lay 3–8 eggs; incubation lasts ~70–90 days.
“Rear view of a three-toed box turtle (Terrapene carolina triunguis) walking through wet soil and ferns in a shaded outdoor enclosure.”
“A three-toed box turtle wanders through damp soil and ferns—these woodland turtles thrive in moist, shaded habitats.”

Care Overview

  • Enclosure: Indoor enclosures I like to go 4x2ft. minimum and a closed chamber design helps with humidity. Outdoors I like to go big as possible, provide plenty of hides and plants.
  • Temperature: Basking 85–90 °F (29–32 °C); ambient 75–85 °F (24–29 °C); nighttime 65–70 °F (18–21 °C).
  • Humidity: Maintain 60–80 %—use moist substrate and provide a waterdish big enough for them to soak in.
  • Diet: Offer leafy greens, worms, insects, mushrooms, and occasional fruits or berries. I like to also add chicken, eggs, beef (cooked) for protein. Mazuri turtle diet is a great commercial pellet to feed.
  • UVB/Sunlight: Indoors UVB light is important. I like to use the tube 10.0 UVB and pair it with a basking bulb. Outdoor make sure you have sun and shade spots through out the enclosure.

Creating a natural enclosure with proper substrate, hiding areas, and humidity is essential for turtle health. Read our guide on tortoise habitats and enclosures for enclosure setup tips.

Full Care Guide: Three-Toed Box Turtle Care Guide

Interesting Facts

  • Fact: Three-toed box turtles are Missouri’s official state reptile.
  • Fact: They can hybridize with other Terrapene carolina subspecies where ranges overlap.
  • FAQ: Are three-toed box turtles good pets? → Yes, they’re hardy and adaptable but require proper humidity and space.
  • FAQ: Do three-toed box turtles swim? → They wade and soak but are primarily terrestrial.

References & Resources

Resources & Next Steps

If you’re new to tortoise keeping, start with our Beginner’s Guide to Tortoise Care before choosing your species.