Testudines (order)

Turtle

Worldwide in temperate and tropical seas, fresh water and on land, with around 350 species. More than half are threatened, making Testudines one of the most endangered vertebrate groups.

Group: Testudines
IUCN: EN
Reviewed: 2026-08-20

Read this first

Popular claims checked

The claim: A turtle can leave its shell, or lives in it the way a hermit crab lives in a borrowed one.

What the evidence says: The shell is part of the skeleton. The carapace incorporates fused ribs and vertebrae, and the shoulder girdle sits inside the ribcage — a rearrangement unique among vertebrates. A turtle can withdraw its head and limbs, but the shell is no more removable than a human ribcage. This matters for the symbolism: retreating into the shell is not a choice to hide, it is the only body the animal has.

Why it persists: The shell looks like an object rather than a body part, and every cartoon turtle reinforces it.

Where you'll meet it: Cartoons and children's media · The 'withdraw into your shell' reading in popular symbolism

Sources (1)

Peer reviewedLyson, Tyler R., Bever, Gabe S., Scheyer, Torsten M., Hsiang, Allison Y., Gauthier, Jacques A. (2013)
Evolutionary origin of the turtle shellCurrent Biology, vol. 23pp. 1-7Open source

The claim: 'Turtle Island' is a generic Native American name for North America.

What the evidence says: Turtle Island comes from specific Eastern Woodlands creation accounts — Haudenosaunee and Anishinaabe among them — in which the land is formed on a turtle's back. It is a particular cosmology from particular nations, not a pan-continental Indigenous term, and hundreds of nations have entirely different creation narratives. It has since been adopted more widely by Indigenous writers themselves, which is a real and separate development from its use as a generic label by outsiders.

Why it persists: It is evocative and short, and it fills a gap for writers wanting a non-colonial name for the continent.

Where you'll meet it: Environmental and New Age writing · General usage as a stand-in for 'Indigenous North America'

Sources (1)

EthnographyHewitt, J. N. B. (1903)
Iroquoian Cosmology, First PartTwenty-First Annual Report of the Bureau of American Ethnology, Smithsonian Institution, Bureau of American Ethnologypp. 127-281

Verified observation

In nature

A reptile lineage over 200 million years old, carrying a shell fused to the skeleton. Many species are extremely long-lived and slow to mature, and sea turtles navigate ocean basins to return to their natal beaches.

morphologyEstablished

The turtle shell is not a separate housing but part of the skeleton: the carapace incorporates fused ribs and vertebrae, which is why a turtle cannot leave it.

Sources (1)

Peer reviewedLyson, Tyler R., Bever, Gabe S., Scheyer, Torsten M., Hsiang, Allison Y., Gauthier, Jacques A. (2013)
Evolutionary origin of the turtle shellCurrent Biology, vol. 23pp. 1-7Open source

evolutionEstablished

Testudines appear in the fossil record from the Late Triassic, over 200 million years ago, making the lineage older than snakes, lizards, birds and mammals.

Sources (1)

Peer reviewedLyson, Tyler R., Bever, Gabe S., Scheyer, Torsten M., Hsiang, Allison Y., Gauthier, Jacques A. (2013)
Evolutionary origin of the turtle shellCurrent Biology, vol. 23pp. 1-7Open source

navigationEstablished

Sea turtles return to nest on or near the beach where they hatched, navigating open ocean using the Earth's magnetic field as a positional cue.

Sources (1)

Peer reviewedLohmann, Kenneth J., Lohmann, Catherine M. F., Brothers, J. Roger, Putman, Nathan F. (2013)
Natal homing and imprinting in sea turtlesThe Biology of Sea Turtles, Volume III, CRC Pressp. 20130209

longevitySupported

Several turtle and tortoise species live well beyond a century and show negligible senescence — mortality risk that does not measurably rise with age.

Sources (1)

Peer reviewedda Silva, Rita, Conde, Dalia A., Baudisch, Annette, Colchero, Fernando (2022)
Slow and negligible senescence among testudines challenges evolutionary theories of senescenceScience, vol. 376pp. 1151-1154Open source

reproductionEstablished

In most turtle species the sex of hatchlings is determined by incubation temperature rather than by chromosomes, so nest warmth sets the sex ratio.

Sources (1)

Peer reviewedJanzen, Fredric J., Paukstis, Gary L. (1991)
Environmental sex determination in reptiles: ecology, evolution, and experimental designQuarterly Review of Biology, vol. 66pp. 149-179Open source

cloacal respirationEstablished

Some freshwater turtles take oxygen from water through papillae-lined cloacal sacs; in the Fitzroy River turtle mean voluntary dive length more than doubled, from 22 to 50 minutes, when the water was oxygenated.

Sources (1)

Peer reviewedPriest, Toni E., Franklin, Craig E. (2002)
Effect of water temperature and oxygen levels on the diving behavior of two freshwater turtles: Rheodytes leukops and Emydura macquariiJournal of Herpetology, vol. 36pp. 555-561Open source

shell bufferingEstablished

Painted turtles survived 125 days submerged in anoxic water at 3 °C by dumping lactate into shell and bone, which release carbonates that buffer the blood — the shell works as a chemical organ, not only as armour.

Sources (1)

Peer reviewedJackson, Donald C., Crocker, Carlos E., Ultsch, Gordon R. (2000)
Bone and shell contribution to lactic acid buffering of submerged turtles Chrysemys picta bellii at 3°CAmerican Journal of Physiology - Regulatory, Integrative and Comparative Physiology, vol. 278pp. R1564-R1571Open source

prospecting divesSupported

Of 26,146 recorded leatherback dives, 99.6% stayed above 300 m; the rare deeper ones, down to 1250 m, were slow descents during transit rather than feeding dives.

Sources (1)

Peer reviewedHoughton, Jonathan D. R., Doyle, Thomas K., Davenport, John, Wilson, Rory P., Hays, Graeme C. (2008)
The role of infrequent and extraordinary deep dives in leatherback turtles (Dermochelys coriacea)Journal of Experimental Biology, vol. 211pp. 2566-2575Open source

vocal coordinationSupported

Amazonian river turtles produce at least eleven distinct sound types in air and underwater, and adult females answer hatchling calls — a vocal repertoire in an animal long assumed silent.

Sources (1)

Peer reviewedFerrara, Camila Rudge, Vogt, Richard C., Sousa-Lima, Renata S., Tardio, Bruno M. R., Bernardes, Virginia Campos Diniz (2014)
Sound communication and social behavior in an Amazonian river turtle (Podocnemis expansa)Herpetologica, vol. 70pp. 149-156Open source

long term memorySupported

Red-footed tortoises trained to associate cues with food of differing value still discriminated correctly when retested 18 months later, with no practice in between.

Sources (1)

Peer reviewedSoldati, Francesca, Burman, Oliver H. P., John, Elizabeth A., Pike, Thomas W., Wilkinson, Anna (2017)
Long-term memory of relative reward valuesBiology Letters, vol. 13p. 20160853Open source

Evidence to reflection

What the behavior can suggest

This section is interpretation, not evidence. It reads documented behavior as a human character trait — a comparison we are drawing, not something the animal intends.

grounded

Positive

The shell is fused to the skeleton — ribs and vertebrae incorporated into the carapace — so the animal carries its structure permanently and cannot put it down.

This is worth stating precisely because the popular reading gets it backwards: the shell is not a shelter the turtle enters but the turtle's own skeleton, worn outside. Read as character, that is someone whose defences are not a strategy but a structure — inseparable from them, carried everywhere, never put down for convenience. There is a cost in that, and it is not a choice.

Your guard is not something you put up; it is how you are built. People who ask you to drop it are asking for something you cannot give.

persistent

Positive

Several species live beyond a century with negligible senescence, and the lineage itself has persisted for over 200 million years.

Persistence here operates at two scales at once: the individual that does not measurably age, and the lineage that outlasted the dinosaurs without changing its basic solution. Read as character, that is someone who wins by remaining — not by being fastest or strongest but by still being there when the alternatives are gone.

You outlast. It looks like slowness right up until it looks like the only thing that worked.

family oriented

Shadow

Sea turtles cross ocean basins to nest on the beach where they hatched, using the Earth's magnetic field to find it; hatchling sex is then set by the nest's temperature.

The return is extraordinary and also inflexible: the animal is bound to one beach it did not choose, and its offspring's sex is decided by that beach's warmth. Read as character, that is attachment to origin as fate rather than preference — someone whose commitments were set before they could weigh them. The polarity is shadow because this fidelity is precisely what makes sea turtles so vulnerable to a warming climate and a developed coastline.

You go back to where you started even when it is no longer good for you, and you would not describe that as a decision.

Named tradition

Traditional symbolism

These accounts are attributed to specific peoples and sources. They are not merged into a generic Native tradition.

Haudenosaunee (Haudenosaunee (People of the Longhouse))

Documented from the 19th century; narrative and ceremonial tradition continuing. Living tradition.

Name in language: Hah-nu-nah (the Turtle); Anowarakowa Kawennote

In the creation account, Sky Woman falls from the world above and is caught by water birds; a great turtle offers its back, and the mud a muskrat brings from the sea floor spreads across the shell to become the land. North America is Turtle Island — the turtle is not a symbol of the earth but the ground it rests on.

Context: The creation narrative underpins Haudenosaunee cosmology, clan organisation and the Thanksgiving Address. The thirteen scutes on a turtle's back are also read against the lunar year in some tellings.

Sources (2)

EthnographyHewitt, J. N. B. (1903)
Iroquoian Cosmology, First PartTwenty-First Annual Report of the Bureau of American Ethnology, Smithsonian Institution, Bureau of American Ethnologypp. 127-281
EthnographyParker, Arthur C. (1923)
Seneca Myths and Folk TalesBuffalo Historical Societypp. 59-73

Modern Western material

Modern readings

Modern Western material, published in the 20th or 21st century. Listed to show what the popular genre claims — not as evidence about any people.

Medicine Cards (Jamie Sams & David Carson)

First published 1988

New Age syncretic

Turtle is presented as the card of Mother Earth and of protection — the querent is advised to withdraw into their shell, ground themselves, and not rush.

Our assessment: The earth association is genuine and specifically documented for the Haudenosaunee and other Eastern Woodlands peoples — but there the turtle is the literal ground of the world in a creation account, not a personal instruction to slow down. The deck converts cosmology into advice.

Sources (2)

Modern deckSams, Jamie, Carson, David (1988)
Medicine Cards: The Discovery of Power Through the Ways of AnimalsBear & Companypp. 129-131
Peer reviewedAldred, Lisa (2000)
Plastic shamans and astroturf sun dances: New Age commercialization of Native American spiritualityAmerican Indian Quarterly, vol. 24pp. 329-332Open source

Core shamanism (Michael Harner, Foundation for Shamanic Studies)

First published 1980

Contemporary practice

Core shamanism reads the turtle as a power animal of grounding and protection, retrieved on the journey and associated with slowing down and returning to the body.

Our assessment: The earth association is documented and specific — for the Haudenosaunee the turtle is the literal ground the world rests on in a creation account, not a personal instruction. Converting cosmology into self-care advice is the move that scholars object to, and it also rests on a factual error: the shell is fused to the skeleton, so 'withdrawing into it' is not a retreat but the animal's only possible posture.

Sources (3)

Modern deckHarner, Michael (1980)
The Way of the Shaman: A Guide to Power and HealingHarper & Rowpp. 57-72
Academic bookWallis, Robert J. (2003)
Shamans/Neo-Shamans: Ecstasy, Alternative Archaeologies and Contemporary PagansRoutledgepp. 29-49
Academic bookZnamenski, Andrei A. (2007)
The Beauty of the Primitive: Shamanism and the Western ImaginationOxford University Presspp. 233-264

Open research questions

Add an Anishinaabe telling of the Turtle Island account alongside the Haudenosaunee one, since the myth correction names both.
Consider a South or East Asian turtle tradition — the Chinese cosmological tortoise and the Hindu Kūrma avatāra are both well documented — to counter the entry's North American concentration.