Welcome to the captivating world of African tree frogs! These intriguing amphibians boast a remarkable range of color and patterns and are known for their unique characteristics. Let's explore the diverse species, habitats, and conservation efforts surrounding these fascinating creatures.
Leptopelis ruficeps
Diversity of African Tree Frogs
African tree frogs, also known as reed and sedge frogs, belong to the family Hyperoliidae. The typical African treefrog has a slender body, large and often bulging eyes usually with horizontal pupils, and rounded pads on the ends of its webbed toes. Its back legs are long and thin, and its front legs are also quite thin. The treefrogs with this appearance are good climbers and leapers. Some of the African treefrogs look quite different. These species, which are often called running frogs, remain on the ground; have no toe pads or toe webbing; have shorter hind legs, frequently only a bit longer than the front pair; and walk or run rather than hop.
One notable genus is Leptopelis, comprising a group of frogs that are as enigmatic as they are diverse. Found primarily in the forests and savannas of sub-Saharan Africa, these frogs are generally larger than their Hyperolius cousins, with some species growing up to four or five inches in length. They are most notable for their large eyes, which are not only striking but also functional, enhancing their vision in low-light conditions. Their skin colors can range from muted browns and greens to more vibrant hues, which help them blend into their leafy surroundings.
The African tree toad, scientifically known as Nectophryne afra, is another interesting species. This tiny toad has long, partially-webbed feet with round discs on the end and is found in West and Central Africa. Its color is a combination of brown, black, white, and tan, providing excellent camouflage.
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Examples of African Tree Frog Color Variations:
- Greater leaf-folding frog, also known as the spiny leaf-folding frog-Chocolate brown with a wide silvery to light brown back, which is sometimes split down the middle with a chocolate brown stripe; also with silvery to light brown color on the top of the hind legs.
- Yellow-striped reed frog-Light green with a yellow stripe on each side of its body from the snout over the large, orange-colored eye to the rump; orange toes and a yellow underside with orange on its rear legs.
- Yellow-legged kassina, also known as the yellow-legged treefrog-Beige with many brown spots on its back, brown bands on its legs and toes, and yellow on the underside of upper rear leg.
- White-spotted reed frog-White, covered with small yellow dots that are outlined in dark brown.
- Transparent reed frog, also known as the water lily reed frog- Light green with orange toes.
- Malagasy variable reed frog-Orange yellow with small brown spots on the head and front half of the back and a narrow brown stripe on each side of the snout.
- Madagascar reed frog, also known as the blue-back frog-Baby blue head and back, orange yellow underside, dark orange toes, two black stripes from the snout to the eyes, and a few black spots on both sides between the eye and the front leg and on the front leg.
Depending on the species, African treefrogs may have eyes that are all brown, gold, whitish, or some other solid color, or that are one color on the top half and another on the bottom half. The Malagasy variable reed frog, for instance, has large eyes that are white on the bottom and pinkish on the top. Most of the treefrogs have large eyes, but in some species they are enormous. The Seychelles treefrog is an example. Its pearly white eyes look almost like big headlights.
Often the color of the frog changes as it grows older. Young froglets in many species are yellow or brown with dark markings down the back, while the adults are brightly colored and patterned. In some species, the youngsters are green, while the adults are brownish. Scientists call these colors the "juvenile phase." Sometimes, many of the adult males have the juvenile colors during the breeding season, too.
Adult African treefrogs may be as small as 0.5 inches (1.2 centimeters) long from the tip of the snout to the end of the rump or as large as 4.3 inches (11.0 centimeters) in length. While males and females are the same size in many species, the females are larger in others. The African wart frog and the greater leaf-folding frog are two species in which the males and females reach the same size. Adult African wart frogs grow to 1.4 inches (3.6 centimeters) long, and adult greater leaf-folding frogs reach 1.6 inches (4.1 centimeters) in length. Female toad-like treefrogs, on the other hand, are larger than males. In this species, females grow to 1.4 to 1.6 inches (3.6 to 4.1 centimeters), while males reach only 1.1 to 1.3 inches (2.9 to 3.3 centimeters) in length. The difference between the sexes is even more noticeable in the big-eared forest treefrogs. Here, females reach up to 3.3 inches (8.4 centimeters) long, while males are about half that size at 1.6 to 1.8 inches (4.1 to 4.6 centimeters) in length.
Habitats and Distribution
African treefrogs live in most of central and southern Africa. Some species are also found on the large island of Madagascar and the tiny island of Seychelles, which are in the Indian Ocean east of southern Africa.
Many species in this family live in often dry and hot grassy fields or in areas that are humid and covered in thick bushes and trees. In addition, some live in rainforests, and others tend to make their homes in land that is currently being farmed or in abandoned and overgrown farmland. Some of the African treefrogs live high in mountains, but many others do not. Many species are arboreal, which means that they live above the ground in trees. Other species stay on the ground, and some are able to dig beneath it.
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Leptopelis frogs are versatile in their habitat preferences but are primarily found in tropical rainforests and savanna woodlands. They are arboreal, spending much of their time in trees, although they descend to the ground to breed.
The habitat range of the African tree toad is West and Central Africa, extending from southwestern Nigeria through Cameroon to Equatorial Guinea (including Bioko), Gabon, and the northeastern Democratic Republic of the Congo. The Bates’s tree toad is found anywhere from southern Cameroon to southwestern Gabon through the southwestern Central African Republic to the northeastern Democratic Republic of the Congo.
Korup National Park
These toads are present in a number of national parks, including the Korup National Park, which is on the border of Cameroon and Nigeria; Monte Alén National Park, which is near the center of Equatorial Guinea in central Africa; and Virunga National Park, which is in the eastern part of the Democratic Republic of the Congo. The national parks exist as reserved areas to provide natural biodiversity for several flora and fauna species, unlike zoos, which keep animals in special enclosures with artificial habitats.
Behavior and Diet
They eat mainly invertebrates, which are animals without backbones. They especially eat insects and other arthropods, which are invertebrates with jointed legs, but they will often add any other animal they can capture and swallow. Usually treefrogs and other species of frogs only eat things that are moving, but at least one of the African treefrogs will eat non-moving things. This treefrog, called the greater leaf-folding frog, will eat the eggs of other frogs that make foam nests for their young. The greater leaf-folding frog pokes its head through the nest and eats the eggs inside.
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African treefrogs are active at night, which is when they look for food and mate. During the day, some of the species that live in hot, open areas dig down into the soil where it is cooler and moister. Scientists are not sure, but they think that some of them, including the toad-like treefrog, either remain underground for the entire dry season in a state of deep sleep, known as estivation, or come out on humid mornings to search for food. Some of these burrowing species shed their skin when they are underground, and this skin dries into a sort of cocoon. The frog remains inside the cocoon, which helps to keep the frog moist. Other species of treefrogs are outdoor types and stay outside even on very hot and dry days. They are not active during the day, however, and simply sit still on leaves until the evenings arrive. The painted treefrog survives hot and dry days by oozing mucus from its skin. This mucus is waterproof, but instead of keeping moisture out, it keeps the moisture in. Even so, they often lose some water from their bodies. Some young painted treefrogs are able to survive even after their bodies have lost half their weight in water. The sharp-nosed reed frog protects itself from dry weather simply by staying down low in grasses on hot days. There, the air is more humid.
One of the most remarkable aspects of Leptopelis frogs is their vocalizations. The males are known for their deep, booming calls, which can be heard resonating through the night air during the breeding season. These calls serve to attract females and assert territory.
Tree toads tend to have shrill, high-pitched sounds and mostly call during the breeding season. They develop their own unique sound among different species.
Reproduction
The typical African treefrog mates during the rainy season. Males head to the water, often a small pool formed by the rains, and begin calling. Sometimes, the males reach the mating area even before the rains have filled the pools. Not all species mate in new pools on the ground. The African wart frog and others mate inside a tree hole above a puddle of water. Scientists still do not know where some species, such as the toad-like treefrog, mate.
Using their often-enormous vocal sacs, the males make a variety of calls. The greater leaf-folding frog, for instance, calls with a creaking sound followed by several clicks in a row. The bubbling kassina makes a sound like tiny bubbles popping. The males of the Afrixalus brachycnemis and other similar species are unusual because their calls have two parts. In this species, the first part is a zipping sound, and the second is a trill. The zipping sound tells other males of the same species to stay away, and the trill is an invitation to females interested in mating. The males of a few species, including the African wart frog, may not be able to call at all.
For those species that mate at tree holes, only one male uses each tree hole, and the female follows his call to him. It is not so easy for those that mate in ground pools. There, many males of several different species of African treefrogs may use the same pool for mating and call at the same time. Despite the confusion of calls and the large number of frogs, a female can pick out the call of a male from her own species and follow that call to a mate. In some species, the female is stopped on her way to a calling male by another male that is not calling, and she mates with him instead. These quiet males that hang around a calling male waiting for a chance to meet a female are called satellite males.
The majority of the species in this family lay their eggs on leaves that hang over pools of water on the ground. For example, the female Betsileo reed frog of Madagascar lays her sticky eggs on leaves just above the water. These eggs hatch into tadpoles, and the tadpoles use their tails to wriggle off the leaves and fall into the water. The leaf-folding frogs also lay their eggs on grass blades or other leaves above a pool of water, but then fold the leaf around the eggs. Since the gel-covered eggs are sticky, the leaf stays folded. When the eggs hatch into tadpoles, the tadpoles wriggle off the leaf and into the water below. In at least one species of leaf-folding frogs, known as the delicate spiny reed frog, the female may mate with more than one male in a night, so the young in her batch of eggs may have different fathers.
The gray-eyed frog is the only species of African treefrog in which the parents provide a foamy nest inside the folded leaf for their eggs. The female makes mucus and then beats it with her hind legs until it turns into foam. She lays her eggs in the foam, and the male folds the leaf around them. The foam helps keep the eggs moist. The eggs hatch, and the tadpoles fall off the leaf and into the water below. Some species of treefrogs, including the kassinas and the sharp-nosed reed frog, lay their eggs right in pools of water along the ground. They typically stick their eggs, sometimes one at a time, onto underwater plants.
Several species, such as the African wart frog, mate in tree holes that hold water. The female lays her eggs on the inside wall of the hole just above the water. The eggs are coated in a gel and stick to the wall. When they hatch into tadpoles, the tadpoles drop into the water. The big-eared forest treefrog and a few other species do not lay their eggs in the water. Instead, these frogs bury their eggs in moist soil that may be 33 feet (10 meters) or more away from any water. Their eggs are large and filled with yolk, which provides food for the young. Eventually, the tadpoles are strong enough to wriggle along the ground to the water, where they continue to grow. In at least one egg-burying species, known as the giant big-eyed treefrog, the eggs do not hatch into tadpoles at all but hatch right into froglets.
Depending on the species, the number of eggs that a female lays may be as few as a dozen or as many as two hundred or more. The female sharp-nosed reed frog and the Seychelles treefrog are two examples of African treefrogs that lay large numbers of eggs. A typical clutch for a sharp-nosed reed frog is about two hundred eggs, while that of the Seychelles treefrog may be as many as five hundred. In most species of African treefrogs, the adult females lay the eggs and leave them to develop on their own. The African treefrog species known as the midwife frogs are different. The females stay with the gel-covered eggs until they hatch and then help the tadpoles escape from the gel.
The tadpoles of many African treefrogs change into froglets within weeks. Some, like the African wart frog, may wait until they are about three months old before going through the change, which is known as metamorphosis. They may need this much time to grow because they live in small pools of water inside tree holes, where food may be very scarce. The sharp-nosed reed frog, on the other hand, lays its eggs in larger pools on the ground. When the tadpoles hatch from the eggs, they find plenty of food and grow so quickly that they can turn into froglets and be ready to mate and have their own young before the end of the breeding season in which they were born.
Conservation Status
The World Conservation Union (IUCN) lists one species as Critically Endangered and facing an extremely high risk of extinction in the wild; nineteen species as Endangered and facing a very high risk of extinction in the wild; twenty-nine that are Vulnerable and facing a high risk of extinction in the wild; sixteen that are Near Threatened and at risk of becoming threatened with extinction in the future; and fifty-three that are Data Deficient, which means that scientists do not have enough information to make a judgment about the threat of extinction.
The one Critically Endangered species is known by its scientific name of Alexteroon jynx. It has only been found in two small areas on hillsides in southwestern Cameroon. This frog lives among thick plants along forest streams that are shaded by overhead trees. It lays a few eggs together in a group on leaves above the water. These eggs hatch into tadpoles, which slide off the leaf and into the stream. Ecologists are concerned not only because it lives in such a small area but also because the forests are not protected and are disappearing as pe...
Despite being listed as Least Concern in terms of conservation status by the IUCN, the African tree toad suffers from habitat loss and may compete with other toad species for food.
Tree Frogs as Exotic Pets
Tree frogs can make exotic and fascinating pets, but they require specific care requirements. As arboreal species, they need vertical tank setups with plenty of climbing opportunities. Owners must be knowledgeable about their unique needs, including the proper diet and environment, to ensure their well-being.
If you’re interested in looking after tree frogs as exotic pets, we recommend contacting Reptile Super Show for more information on our next events.
Creating an Ideal Habitat
To create an ideal habitat for your tree frog, start with a properly sized enclosure that replicates their natural environment. Provide appropriate lighting, heating, and humidity levels. Use a substrate that holds moisture, and add live plants and natural decorations to mimic their natural surroundings.
The size of the enclosure will depend on the number of frogs you plan to keep, their size, and species. Tree frogs are sensitive to temperature and humidity changes. Ensure that the temperature in the enclosure is suitable for your frogs, depending on their species. Additionally, maintain optimal humidity levels to avoid dehydration and stress on your tree frogs.
Your tree frog’s habitat should include essential elements such as substrate, decorations, and hiding spots. Appropriate substrate like coco coir or sphagnum moss is necessary to absorb moisture and simulate the natural ground cover in the wild. Adding decorations like live plants, branches or logs, or rocks and water features provide enrichment and hiding spots that your tree frog will enjoy.
Regular cleaning and maintenance are crucial for keeping your tree frog habitat healthy. Routinely removing droppings, uneaten food, and debris is necessary to control odor and prevent bacterial growth. Creating an ideal tree frog habitat requires knowledge and attention to detail.
Proper Care
Proper care for tree frogs includes providing a diet of appropriately sized insects, maintaining correct temperature and humidity levels, and offering hiding spots and climbing structures. It’s crucial not to handle them too frequently as it can cause stress.
Tree frogs are insectivores and require a diet rich in live insects such as crickets, roaches, and wax worms. Tree frogs are delicate creatures and should be handled with care. Make sure to wash your hands before handling them and avoid grabbing them by their legs or tail. Check the humidity levels in their enclosure regularly. Clean the enclosure weekly. Monitor their behavior and health regularly. Tree frogs are susceptible to a range of health issues. Signs of illness may include lethargy, loss of appetite, and skin discoloration.
Remember, proper care and attention are crucial to ensuring your tree frog lives a long and healthy life. If you have any questions or concerns about your tree frog’s care, don’t hesitate to contact us at Reptile Super Show.
Here is a table summarizing the key aspects of African Tree Frog care:
| Aspect | Details |
|---|---|
| Enclosure Size | Depends on the number, size, and species of frogs |
| Temperature | Suitable for the specific species |
| Humidity | Optimal levels to avoid dehydration |
| Substrate | Coco coir or sphagnum moss |
| Decorations | Live plants, branches, logs, rocks, water features |
| Diet | Live insects (crickets, roaches, wax worms) |
| Handling | Minimize handling to reduce stress |
| Cleaning | Regular removal of waste and debris |
Owning a tree frog as a pet comes with its own set of rewards and challenges. Watching them climb and jump around their enclosure is sure to provide hours of entertainment, while the sound of their croaking can create a soothing ambiance.
