Loggerhead Turtle: A Strong and Resilient Species

“The loggerhead turtle’s immense head is not just powerful-looking — it’s a tool for crushing the hard-shelled prey that other turtles cannot eat.”

Loggerhead Sea Turtle – The Great Barrier Reef’s Powerful Shell Crusher

Loggerhead Sea Turtle: A Strong and Resilient Species

Loggerhead Turtle

Recognisable by Their Large Heads—Loggerhead turtles have strong, oversized heads and powerful jaws, perfect for crushing hard-shelled prey like crabs, molluscs, and sea urchins.
One of the Largest Sea Turtles – These turtles can grow up to 1 metre (3.3 feet) long and weigh up to 160 kg (350 lbs), making them one of the heaviest sea turtle species.
Nesting on Queensland Beaches – Every year, female loggerhead turtles return to Queensland’s sandy beaches to lay their eggs, including Mon Repos near Bundaberg and the southern Great Barrier Reef islands. Nesting runs from late October to early March, peaking in December.
Excellent Long-Distance Swimmers—Loggerheads are highly migratory, travelling thousands of kilometres between feeding and nesting grounds, sometimes crossing entire oceans.
Crushes Hard-Shelled Prey – Unlike green sea turtles, which mostly eat seagrass, loggerheads feast on shellfish, using their strong jaws to break open their food.
Few Hatchlings Survive – an often-quoted estimate is that only about 1 in 1,000 reaches adulthood. Baby loggerheads face many natural predators and challenges in their journey from nest to ocean, making conservation efforts crucial.
Endangered in Australia – Due to threats like habitat loss, plastic pollution, and climate change, loggerhead turtles are listed as Endangered under Australian and Queensland law, and as Vulnerable worldwide by the IUCN.

Discover the loggerhead turtle

Learn about the Loggerhead sea turtle, its unique features, behaviours, and the conservation efforts to protect this incredible species.

Introduction

One of the most well-known sea turtle species. These amazing creatures have distinct features and behaviours that set them apart from other sea turtles. Wild threats include habitat destruction, pollution, and accidental capture in fishing nets. We will explore the world, including its physical characteristics, behaviour, and conservation efforts.

Quick Facts About the Loggerhead Turtle

Scientific name: Caretta caretta
Also known as: loggerhead turtle
Found in: warm coastal waters worldwide; in Australia, mainly the southern Great Barrier Reef and the nearby mainland coast
Diet: shellfish, crabs, sea urchins and jellyfish
Size: nesting females on the reef average about 96 cm shell length; adults weigh roughly 90 to 160 kg
Nesting: late October to early March, peaking in December, on southern reef islands and mainland beaches such as Mon Repos
Best chance of sighting: southern reef islands such as Lady Elliot and Heron Islands, and Mon Repos near Bundaberg in the nesting season

Scientific Classification

Kingdom: Animalia
Phylum: Chordata
Class: Reptilia
Order: Testudines
Family: Cheloniidae
Genus: Caretta
Species: Caretta caretta
Conservation status: Endangered in Australia (EPBC Act and Queensland Nature Conservation Act). Vulnerable globally (IUCN, 2015); the South Pacific population that nests in eastern Australia is Critically Endangered

Loggerhead Sea Turtles Habitat and Distribution

They can inhabit oceans worldwide and be found in various habitats, including coastal waters, bays, and the open ocean.
They are also known for their impressive ability to migrate long distances, travelling hundreds or thousands of miles between their nesting and feeding grounds.

It is found in oceans worldwide, including the southern Great Barrier Reef, where they nest on islands of the Capricorn–Bunker Group, offshore from Gladstone and Bundaberg.
They inhabit various habitats, from coastal waters to the open ocean.

Physical Characteristics

The unique physical characteristics distinguish it from other sea turtle species. They have large, sturdy heads with powerful jaws that crush their food, including crabs, clams, and other hard-shelled animals. With a rugged, bony shell covered in scales, with a reddish-brown colour on top and a pale yellow underside.

The Loggerhead sea turtle has a large, sturdy head with powerful jaws.
They have a hard, bony shell covered in scales.

Loggerhead Sea Turtle Behaviour and Diet

They are strong swimmers and capable divers. Females generally return to nest in the region where they hatched. Their diet comprises various hard-shelled animals, including crabs, clams, and other molluscs.

They are strong swimmers and capable divers.
They have a remarkable homing ability, allowing them to navigate back to the region where they hatched to lay their eggs.

Threats and Conservation

The International Union for Conservation of Nature (IUCN) lists the loggerhead as Vulnerable worldwide (2015), but the South Pacific population that nests in eastern Australia is listed as Critically Endangered. In Australia the species is listed as Endangered under national and Queensland law. They face numerous threats in the wild, including habitat destruction, pollution, and accidental capture in fishing nets. In Australia, these threats have led to a serious decline, and the loggerhead is listed as Endangered.

Loggerheads are listed as Endangered in Australia and Vulnerable worldwide (IUCN, 2015).
They face numerous threats in the wild, including habitat destruction, pollution, and accidental capture in fishing nets.

Conservation Efforts

Conservation efforts are underway to protect them, including the following:

Protected areas

Marine protected areas have been established to safeguard the habitats of Loggerhead sea turtles. These areas restrict human activities that could harm the turtles and their environments, such as fishing and development.

Nesting beach

Conservation efforts include beach cleanups, erosion control, and monitoring to ensure the safety and health of nesting beaches.

Turtle-friendly fishing gear

To reduce accidental capture in fishing nets, turtle-friendly fishing gear is being developed and promoted to fishermen worldwide.

Public education and awareness

Educating the public about protecting their habitats is essential in promoting conservation efforts. This education includes raising awareness about these turtles’ threats and providing information on reducing human impacts on their habitats.

Implementing these conservation efforts can help protect the Loggerhead sea turtle and ensure its survival for future generations.

Related Species

Other sea turtles found on the Great Barrier Reef include the green turtle, the hawksbill turtle and the flatback turtle.

For schools and study groups
Learning about reef animals in class? We help schools, universities and study groups plan educational trips to the Great Barrier Reef. Depending on the program, groups can enjoy guided snorkelling and marine biology presentations.
Great Barrier Reef Educational Groups →

Frequently Asked Questions

Where can I see loggerhead turtles on the Great Barrier Reef?

Loggerheads are found mainly on the southern Great Barrier Reef. Good places include Lady Elliot Island and Heron Island, and Mon Repos Conservation Park near Bundaberg, on the mainland, where loggerheads nest in summer. You might also see one while snorkelling or diving, but sightings are never guaranteed.

How long do loggerhead sea turtles live?

No one knows exactly. Scientists estimate loggerheads can live 70 years or more.

Where do loggerhead sea turtles live?

Loggerheads live in warm coastal waters around the world. In Australia, the main nesting area is the southern Great Barrier Reef and nearby mainland beaches such as Mon Repos.

What is the difference between male and female loggerhead sea turtles?

Adult males have much longer, thicker tails than females.

How do loggerhead sea turtles nest?

Females crawl up the beach at night, dig a nest in the sand and lay their eggs. In Queensland, nesting runs from late October to early March, peaking in December. The hatchlings emerge about two months later and head for the sea.

Is the loggerhead turtle endangered?

In Australia, yes. The loggerhead is listed as Endangered under national and Queensland law. Globally the IUCN lists it as Vulnerable (2015), but the South Pacific population that nests in eastern Australia is listed as Critically Endangered.

Conclusion

A unique and fascinating species that plays an essential role in the health of our oceans. While they face numerous threats in the wild, conservation efforts are underway to protect these incredible creatures and their habitats. By supporting these efforts and raising awareness about the importance of protecting our marine ecosystems, we can ensure survival for future generations.