Goliath frogs excavate meter-long pools and guard their tadpoles through the night.
Some frogs are thumbnail-size, but Cameroon's Goliath frog (above) is bigger than a whole human foot, measuring up to 34 centimeters and weighing up to 3.3 kilograms.
Although the world's largest frogs are well known for their girth, their jumping prowess, and their ability to provide a hearty meal for us humans, their reproductive behavior has long been a mystery.
Now, scientists think they know how these forest-dwelling frogs care for their young: by building them their own swimming pools.
Most frogs lay their eggs on whatever happens to be nearby—leaves, twigs, even the ground itself.
But researchers looking for Goliaths (Conraua goliath) along a 400-meter stretch of the Mpoula River in western Cameroon discovered a strange sight: empty dips in the shore rocks that had been cleared of leaves, gravel, and other debris. Soon, the researchers happened upon a few other cleared pools above the water line...
My second zoo, dubbed Kihansi Biopark (named after the kihansi spray toad) is up and running! My only mammals at the moment are these beautiful west african lions, my two females named Ikhwezi and Ilanga, and their very handsome boyfriend named Ingubo :’)
These two shots were taken in my exotics house at night, as I thought the heat lamps made for an interesting aesthetic with the animals basking under them. Featuring Bruna my female colombian boa constrictor and Alvaro my male antillean iguana.
The rest are some more random pics I got during enclosure inspection! Featuring from top to bottom: Boni the lehmann’s poison dart frog, Akama the goliath frog, Kasam the emperor scorpion, Cecil the golden poison dart frog, and Emile the green iguana (this is the best camera angle ever lmaooo)
Goliath Frog: They’re the largest frog in the world! Weighing up to 3.3 kg (7.2 lbs) and reaching over a foot (30 cm) long, their eggs are surprisingly the same size as other frogs’. These eggs are laid in guarded nests the parents build in pools of water. They also lack vocal sacs and their calls are long, high-frequency trills. They’re found in very specific regions in Equatorial Guinea and Cameroon.
Golden Poison Dart Frog: Although quite small, these Columbian frogs are the largest and most toxic poison dart species! One frog’s venom is hypothesized to be enough to kill ten adult humans. However, they get their venom from the insects they eat and those kept in captivity are non-toxic. They’re also caring parents! Eggs are laid in leaf litter and after they hatch, tadpoles are transported on their parent’s backs to water-filled bromeliads where they will grow to adulthood. Despite their species name, juveniles are mostly black and grow into their colouration, of which four morphs exist. (Pictured is the yellow morph.)
Goliath frogs excavate meter-long pools and guard their tadpoles through the night
Cameroon's Goliath frog is bigger than a whole human foot, measuring up to 34 centimeters and weighing up to 3.3 kilograms. Although the world's largest frogs are well known for their girth, their jumping prowess, and their ability to provide a hearty meal for us humans, their reproductive behavior has long been a mystery. Now, scientists think they know how these forest-dwelling frogs care for their young: by building them their own swimming pools.
Most frogs lay their eggs on whatever happens to be nearby—leaves, twigs, even the ground itself. But researchers looking for Goliaths (Conraua goliath) along a 400-meter stretch of the Mpoula River in western Cameroon discovered a strange sight: empty dips in the shore rocks that had been cleared of leaves, gravel, and other debris. Soon, the researchers happened upon a few other cleared pools above the water line.
Some pools were empty. But others were full of tadpoles. Then, the researchers realized what they were looking at—Goliath frog nests. Altogether, they found 22 potential nests, 14 of which contained up to 3000 eggs each, the team reports today in the Journal of Natural History. A few nests held tadpoles of different ages, suggesting the frogs reuse the pools. When researchers filmed one nest with an infrared time-lapse camera overnight, they observed a parent watching over its young until dawn, keeping potential predators at bay...