The Goliath Frog, the largest living frog on Earth, is facing extinction after a 50% decline in population size in the last three generations, mainly due to human activity.

The Goliath Frog certainly lives up to its name. Reaching up to 13 inches long (32 cm) from snout to vent, and weighing up to 7.2 lb (3.25 kg), it is by far the world’s largest frog. However, it has a contrastingly tiny habitat range in Africa’s Cameroon and Equatorial Guinea, which makes it particularly vulnerable to human-related habitat destruction. They are skittish creatures that tend to avoid humans as much as possible, but increasingly sophisticated traps and habitat destruction have caused a massive decrease in the number of Goliath frogs, and experts warn that if things don’t change soon, this impressive creature will become extinct.

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The Brazilian flea frog (Brachycephalus pulex) measures only between 7 and 8 millimeters in length, which likely makes it the smallest vertebrate on Earth.

In 2011, Mirco Solé, a researcher at the State University of Santa Cruz in Brazil, discovered the tiny Brazilian flea frog, an amphibian so small that it could comfortably fit on a small coin. The discovery made news headlines in the scientific community, but because of a small available sample, there was simply no way to provide conclusive information regarding the frog’s size. Now, over a decade longer, a team led by the same Mirco Solé has published an extensive study on the elusive frog species that can only be found on two forested hillsides in Bahia, Southern Brazil. It shows that the flea frog is a very likely candidate for the title of ‘world’s smallest vertebrate’.

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A team of scientists studying freshwater ponds on an Australian island observed a rather peculiar mosquito behavior – when feeding on frogs, mosquitoes would always go for the nostrils.

John Gould and Jose Valdez – the first with the University of Newcastle, in Australia, the other the German Center for Integrative Biodiversity Research – spent three years surveying approximately 60 freshwater wetland ponds on Kooragang Island, in New South Wales, Australia. During their research, they observed and photographed a total of 3977 amphibians, but upon returning to their laboratory and laying out all of their photos, they noticed something intriguing. Out of their thousands of photos, 12 of them showed mosquitoes feeding on various species of frogs, but in all of them, the mosquitoes were sucking blood from the animals’ nostrils.

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Researchers have discovered that green tree frogs in the Chernobyl Exclusion Zone have turned dark in order to better mitigate the effects of radiation.

In April of 1986, a reactor at the Chernobyl nuclear power plant in Ukraine exploded, releasing approximately 100 times the energy released by the nuclear bombs of Hiroshima and Nagasaki and drastically altering the lives of both humans and wildlife in the surrounding area. But while authorities were able to evacuate most civilians from the area closest to the nuclear disaster, the animals were left to their own devices. In the decades since, the Chernobyl Exclusion Zone has become a wildlife refuge that offers a unique view into the evolution triggered by the nuclear meltdown.

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The Malayan leaf frog, a.k.a long-nosed horned frog, is one of the most remarkable creatures on Earth, at least in terms of natural camouflage.

We’ve featured some truly impressive masters of camouflage in the past, from the dead leaf butterfly to a plant that evolved to mimic the rocky terrain it grows on, but the Malayan leaf frog is definitely up there with the best of them. As an ambush hunter that waits for unsuspecting prey to cross its path, this amphibian needs to remain unnoticed for as long as possible, and what better way to do that than blend into the leaf-covered forest floor it calls home? Its unique physical features make it almost impossible to visually detect in its natural habitat, and looking at the photos below, it’s easy to see why.

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The golden poison dart frog is a very deceptive creature – despite its tiny two-inch frame, it happens to be the most poisonous creature on Earth. A single amphibian packs enough venom in it to kill over 10 adult men in about 3 minutes. In fact, the species gets its name from the native Emberá hunters of Colombia, who once used the frogs to make lethal blowgun darts.

The bright yellow frogs can only be found in small rainforest on the Pacific coast of Colombia, and their coloring can sometimes vary between yellow, orange, or pale green. The glamour of their appearance is a deliberate ploy, a tactic called aposematic or ‘warning’ coloration, to ward off potential predators. As proven by a 2001 study by Kyle Summers of East Carolina University in Greenville, the brightest frogs are always the most toxic.

Simply coming in contact with a golden poison dart frog doesn’t necessarily put you in mortal dangers, as the amphibians only produce and excrete the potent toxin through their skin only when they feel threatened. But picking up one of these tiny creatures and holding it in your hand for more than a few seconds without gloves is suicide. The frog’s skin quickly becomes covered in alkaloid poison (batrachotoxin) that has the ability to ‘freeze’ nerves, stopping them from transmitting impulses. Within minutes, the victim experiences uncontrollable muscle contractions and eventually heart failure.

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Scientists in Ecuador have discovered a new species of frog that is able to morph the texture of its skin – from spiny to smooth – within a matter of minutes. Aptly named ‘mutable rain frog’, the tiny, finger-nail sized creature is the first shape-shifting amphibian to ever be found.

According to a Livescience report, the mutable frogs were found in Reserva Las Gralarias, a protected cloud reserve forest on the western slopes of Ecuador’s Andes Mountains. The incredible discovery is credited to biologist Katherine Kryna and naturalist Tim Krynak, who have spent the past decade combing the reserve for rare frog species.

The duo first spotted the frog in 2006, when they had captured it on camera. On closer inspection of the photograph, they realised that it could be a new species. The frog’s spiny-textured skin stood out, so they started calling it ‘punk rocker’. “It wasn’t until we saw the amazing texture of its skin that we thought, ‘wow, this is something different,’” said Katherine.

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The Pseudis Paradoxa is the Benjamin Button equivalent of the amphibian world. The paradoxical creature starts off as a 25-cm-long tadpole and shrinks as it grows. ending up as a small tropical frog, about a quarter of its original size.

When biologists discovered the paradoxical frog in the South American wild,they were understandably confused. At first, they thought the adult frogs were actually the babies, which later grew into giant tadpoles, exactly the opposite of how every other frog species in the world develops. They later figured out that the 11-inch tadpoles were indeed the juveniles, but still couldn’t explain the bizarre phenomenon.

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There are several creatures that possess a certain tolerance to subzero temperatures, but none as amazing as the Alaskan Wood Frog. This tiny amphibian can survive being almost completely frozen during winter, only to miraculously come back to life as soon as spring arrives!

For days, even weeks weeks at a time during its period of winter hibernation, over 60 percent of the frog’s body freezes;  it stops breathing and its heart stops beating. Its physical processes like metabolic activity and waste production come to a halt. “For all intents and purposes, they are dead,” said Don Larson, a Ph.D. student at Fairbanks, Alaska. As per his research, wood frogs can survive long winters where temperatures range between -9C to -18C. In fact, it can go through 10 to 15 freeze/thaw cycles over the course of a single season.

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The moor frog certainly cannot turn into a prince with true love’s kiss. But this seemingly uninteresting amphibian is capable of something quite spectacular – it changes color from a boring brown to an azure blue, just to be able to distinguish between genders during mating season. The ‘before’ and ‘after’ pictures are really quite unbelievable – it looks they’re two different frogs.

A fully grown adult male moor frog is up to seven centimeters long and reddish-brown in color. But every year, between March and June, the frog exhibits chameleon-like tendencies. During this period, the frogs emerge from their winter hibernation and are naturally in the mood to procreate. They populate the ponds in the lowlands of Central and Southern Europe, completely filling the air with their mating calls. The sounds they create are similar to the noise of air released from a bottle under water.

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A video shot in Japan recently went viral after it showed a bullfrog served in a Japanese restaurant still blinking and twitching on the plate, after being skinned alive and cut into pieces.

This is definitely one of the most disgusting things I have ever seen. Singaporean website STOMP recently released a series of photos and a video shot in a Japanese restaurant where apparently people like to eat bullfrogs while they’re still alive. The video shows a customer going into the restaurant and how the cook there simply picks up a big frog, sticks a knife in it, removes all its inedible innards and skins it alive. Then the focus moves on the smiling customers who enjoys a healthy serving of bullfrog sashimi while the animal is looking at her from her plate, blinking and twitching… That doesn’t seem to bother the young woman much, as she even gives the thumb-up sign for the quality of the dish. Read More »

Just like tattooed gold fish and live turtles sealed in keychains, artificially dyed frogs have been sold in China for a few years now, despite complaints from animal activists and warnings from animal welfare experts.

It seems regular frogs weren’t cheerful-looking enough for some people, so they decided to add a bit more color to mother nature’s design, through modern technology. Using various devices and techniques, including lasers and bombarding the poor amphibians with large amounts of industrial chemicals which are absorbed by their skin, they create what is known as colored frogs. The colors are vibrant and apparently last for up to 4-5 years.

For some reason, many Chinese seem to like these radioactive-looking frogs, and they are in very high demand at aquariums and ponds across the country. Some even buy them as pets for their children, and vendors say people “like the bright colors because they are so cheerful”. Unfortunately, few of them understand that the high doses of chemicals are lethal as indicated by signs like “Not for human consumption” on the side of their tanks. Experts say thousands of tropical frogs could die as a result of this colored frog trend.

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