# Alligator Snapping Turtle (*Macrochelys temminckii*)

> The alligator snapping turtle (Macrochelys temminckii) is North America's heaviest freshwater turtle, a prehistoric-looking ambush predator that lures fish within striking range using a worm-like appendage on its tongue. Adults typically weigh 45–80 kg (100–175 lb), grow shells up to 80 cm long, and may live 70 years or more.

- **Category:** Reptile
- **Conservation status (IUCN):** Vulnerable
- **Range:** Rivers, bayous, and lakes draining to the Gulf of Mexico, from the Florida Panhandle to East Texas and up the Mississippi basin.
- **Canonical page:** https://globalanimalguide.org/animals/alligator-snapping-turtle/
- **Last reviewed:** 2026-07-16

## Scientific classification

- **Kingdom:** Animalia
- **Phylum:** Chordata
- **Class:** Reptilia
- **Order:** Testudines
- **Family:** Chelydridae
- **Genus:** Macrochelys

## Facts at a glance

| Attribute | Value |
| --- | --- |
| Scientific name | Macrochelys temminckii |
| Diet | Fish, molluscs, crayfish, amphibians, snakes, and carrion — anything it can catch |
| Habitat | Deep, slow rivers, bayous, and lakes of the south-central United States |
| Lifespan | Commonly 50–80 years; possibly a century or more |
| Weight | Typically 45–80 kg (100–175 lb); exceptional males exceed 100 kg |
| Top speed | A slow, deliberate walker — but its strike takes a fraction of a second |
| Conservation status | Vulnerable (IUCN) |

## A living fossil

With a spiked, three-keeled shell, a massive head that will not fit inside it, a hooked beak, and eyes on the sides of the skull, the alligator snapping turtle looks unchanged since the age of dinosaurs. Algae often grows on the shell, completing its camouflage as a mossy log. Big males can exceed 100 kg, though 45–80 kg is typical.

## The tongue lure

This turtle hunts by deception. It lies motionless on the riverbed with jaws agape and wiggles a pink, worm-shaped appendage on its tongue — the only lingual lure known in any reptile. A fish that swims in to investigate the 'worm' is engulfed by a strike among the fastest movements in the animal kingdom.

## Habitat and range

The species lives in river systems draining into the Gulf of Mexico: the Mississippi basin and rivers of the Florida Panhandle, Georgia, Alabama, Louisiana, and East Texas, historically north to Kansas, Iowa, and Illinois. It favours deep, slow water with muddy bottoms and plenty of submerged structure.

## An aquatic homebody

Alligator snappers are almost fully aquatic, able to stay submerged for the better part of an hour, and males may never leave the water. Females come ashore only to nest, sometimes travelling considerable distances to reach a suitable bank. Home ranges can span many kilometres of river.

## Reproduction

Females nest in late spring, laying 10–50 eggs in a flask-shaped nest dug above the flood line. Incubation lasts around 100–120 days, and nest temperature determines the sex of the hatchlings. The turtles grow slowly and do not mature until roughly 11–13 years old.

## Conservation

Commercial harvesting for turtle soup in the 1960s and 1970s devastated populations, and the species is now listed as Vulnerable and protected across its range. Dams, channel dredging, and bycatch add further pressure. Genetic work has recently split the complex into additional species — the Suwannee and Apalachicola alligator snapping turtles — and head-start programmes are releasing juveniles in several states.

## Frequently asked questions

### How strong is an alligator snapping turtle's bite?

Powerful enough to crush mollusc shells and amputate fingers, although tales of it shearing through broom handles are exaggerated. It is not aggressive but should never be handled — the neck reaches surprisingly far back.

### How long do alligator snapping turtles live?

Captive individuals routinely pass 50 years, and wild lifespans of 70 years or more are considered likely; some authorities suspect they can approach a century.

### Where do alligator snapping turtles live?

In rivers, bayous, and lakes draining to the Gulf of Mexico — the Mississippi basin and waterways of the southeastern United States, from the Florida Panhandle to East Texas.

### How does the tongue lure work?

The turtle rests on the bottom with its mouth open and wriggles a small pink, worm-like projection on its tongue. Fish attracted by the 'worm' swim straight into the open jaws, which snap shut in a split second.

### Are alligator snapping turtles endangered?

They are listed as Vulnerable by the IUCN after heavy historical harvesting for soup, and are protected by law throughout their range; captive breeding and release programmes are helping some populations recover.

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Source: Global Animal Guide (https://globalanimalguide.org/animals/alligator-snapping-turtle/). Licensed CC BY-NC 4.0 — free for non-commercial reuse with attribution.