Goliath frog

The goliath frog is the biggest frog alive.

It lives near waterfalls in the forest. These frogs have green skin on top. Their bellies are yellow or orange.

To make a home, they dig pools. They even move large stones to build nests. This hard work helps their babies stay safe.

These frogs eat many things. They eat insects and small fish. They hunt on land and in the water.

It is hard for these frogs to live now. People hunt them for food. They also lose their forest homes. We must help them stay safe.

The goliath frog is the largest living frog.

These big frogs live near waterfalls. They live in Cameroon and Equatorial Guinea. Most live in wet forests near rivers.

These frogs eat many things. They are omnivorous, which means they eat both plants and animals. They like to eat insects and crabs. Larger frogs also eat fish and small mammals.

To raise babies, they build nests in the water. They can clear out old leaves from a pool. They can even dig new pools in the riverbank. They may move large stones to do this.

This hard work helps protect the eggs.

Baby frogs start as small tadpoles. They grow legs and lose their tails over 85 to 95 days. This change is called metamorphosis.

Today, these frogs are endangered. This means they are at risk of disappearing. People hunt them for food. They also lose their forest homes. Some frogs get sick from tiny worms in their blood. We must work to keep them safe.

The goliath frog is the largest living frog in the world.

These massive creatures can grow very long and heavy. One huge specimen caught in the Muni River system in 1960 weighed 3.3 kilograms. That same river system also provided the longest specimen in 1966. That frog had a snout-to-vent length of 32 centimeters. Their skin is bumpy and colored green sienna on top. The bottom of their bodies is yellow or orange.

These frogs live in a very specific way. They mostly stay near waterfalls in Cameroon and Equatorial Guinea. Their home is divided into a dry season and a rainy season. They live in thick forests near the coast and rivers. They prefer areas with moving water like rapids or cascades. You can find them in the Sanaga Basin and the Mbía Basin. They also live in the Kienke, Ntem, and Mbía Basins.

Raising babies is a big job for these frogs. They build three different types of nests in or near rivers. Some frogs clear out old leaves from a river pool. Others expand a pool by building a small dam. Some even dig new pools into the gravel riverbanks. This can involve moving very large stones.

Building these nests might be why they grew so large. Moving heavy objects is a hard task that requires strength.

Baby frogs go through a long change called metamorphosis. They start as small eggs attached to underwater plants. These eggs turn dark gray-brown after the first day. The tadpoles grow for about 85 to 95 days. In the first month, they only have tiny gills. By the second month, they begin to eat leaves. During the third month, their back legs start to grow. Finally, they grow front legs and lose their tails.

Today, these frogs face many hard jobs to stay safe. They are an endangered species because they are hunted for food. People also destroy the forests where they live. Some frogs also get sick from tiny worms called nematodes. These parasites live in their blood and can make them weak.

In Equatorial Guinea, the government limits how many can be exported. This helps protect the remaining frogs in the wild.

The goliath frog, known scientifically as Conraua goliath, is the largest living frog on Earth.

This massive amphibian belongs to the family Conrauidae and is often called the giant slippery frog. Because of its immense size, it plays a unique role in its ecosystem. These frogs are highly specialized animals that require specific environments to survive. They are currently classified as an endangered species due to several human-driven and natural pressures. Understanding their biology and life cycle helps us see why they are so unique.

Physically, the goliath frog is a giant among amphibians. While males and females look very similar, their sheer scale is remarkable. A verified specimen from the Muni River system in 1960 weighed 3.3 kilograms. Another specimen from the same river in 1966 reached a snout-vent length of 32 centimeters.

Their skin on the back, or dorsum, is granular and colored green sienna. The underside, or ventral part, is yellow or orange. They possess a conspicuous tympanum, which is the external part of the ear, measuring about 25 millimeters in diameter. Their toes are fully webbed with large interdigital membranes to assist in movement.

These frogs have a very selective habitat in Cameroon and Equatorial Guinea. They live in dense equatorial forest fringes near the coast. They are most often found near waterfalls, rapids, and cascades in river basins. Specifically, they inhabit the Sanaga, Kienke, Ntem, and Mbía Basins. Their environment is shaped by two distinct seasons. The dry season lasts from November to April, while the rainy season runs from May to October. This seasonal change influences their behavior and the availability of water for their offspring.

Reproduction for the goliath frog involves complex nesting behaviors. They do not have vocal sacs, so they do not use mating calls. Instead, they build semi-circular nests in or near rivers. There are three main nest types. The first type involves clearing detritus from existing river pools. The second type involves expanding a pool by building a dam. The third type is the most difficult, involving digging new pools into gravel riverbanks.

This digging can require moving very large stones. Scientists believe this heavy labor may be a reason why the species evolved such large body sizes.

The life cycle of a goliath frog begins with egg masses containing several hundred to a few thousand eggs. These eggs are often attached to aquatic vegetation. The larval stage, or tadpole stage, lasts between 85 and 95 days. During the first month, the tadpoles have transparent external gills and no differentiated organs. In the second month, they begin to feed on leaves and develop two rows of teeth on their lips. By the third month, the posterior legs begin to form. Finally, in the fourth month, the tadpoles undergo metamorphosis. The tail is reabsorbed, and the frog takes on its adult shape and color.

As omnivores with a carnivorous preference, goliath frogs eat a wide variety of prey. Their diet changes based on their weight and stage of development. Smaller frogs eat annelids, arachnids, insects, and even small reptiles. Larger, fully developed frogs eat more substantial food like fish, small mammals, and other frogs.

This diverse diet allows them to thrive in both terrestrial and aquatic settings. However, their large size means they have few natural predators, with humans being a primary threat.

Today, the goliath frog faces serious survival challenges. Habitat destruction and the pet trade are major concerns. While they are exported to zoos, they are often shy and nervous in captivity. They are also threatened by parasites, specifically a microfilarial nematode called Icoseilla. This parasite lives in the blood and lymphatic system. It is more common during the dry season when water levels drop. To help protect them, the Equatorial Guinean government limits pet trade exports to no more than 300 frogs per year. Conservation efforts must work with local communities to ensure these giants continue to inhabit their river homes.