Frogs
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129 free Frogs trivia questions with answers — nature quiz, new questions added Oct 2026.
50 free frogs trivia questions with answers. From the tiniest frog in Papua New Guinea to the massive Goliath frog of West Africa, the world of frogs is full of surprises. These remarkable amphibians can freeze solid and survive, carry babies in their vocal sacs, glide between trees, and produce enough toxin to kill a dozen humans. Whether you know your tree frogs from your toads or just love Kermit, this quiz will put your frog knowledge to the test across 129 questions spanning species, anatomy, life cycles, conservation, and pop culture.
30 of 129 questions with answers and explanations. Play the quiz
Q 01What feature gives glass frogs their name?
See-through belly skin
See-through belly skin shows a glass frog's heart, liver and gut; a sleeping frog turns two to three times more transparent by packing about 89% of its red blood cells into its liver.
Q 02In the Brothers Grimm tale The Frog Prince, what does the frog fetch from a well for the princess?
A golden ball
A golden ball: in the Grimms' telling no kiss breaks the spell, because the princess hurls the frog against her bedroom wall in a fury and he lands as a prince.
Q 03Which body part does a frog use to help push swallowed food down its throat?
Its eyeballs
Its eyeballs: a frog's eyes sink through gaps in the skull as it gulps and press the meal toward the gullet, and leopard frogs that could not retract them needed about three-quarters more swallows per cricket.
Q 04In everyday usage, what most often marks an animal out as a toad rather than a frog?
Dry, warty skin
Dry, warty skin is the everyday marker, but the labels are informal: the smooth-skinned Panamanian golden frog belongs to the true toad family, and every toad is, strictly speaking, a frog.
Q 05Which puppeteer built the first Kermit in 1955 from his mother's old coat and a ping-pong ball?
Jim Henson
Jim Henson made the puppet for a local Washington TV show, Sam and Friends, and at first Kermit was a vague lizard-like creature: he only became a frog later.
Q 06Which frog from Cameroon and Equatorial Guinea is the largest in the world?
Goliath frog
The goliath frog can top 3 kg and 30 cm, yet it starts out ordinary: its tadpoles are no bigger than other frogs'.
Q 07Unlike a human's, a frog's tongue is attached at which part of its mouth?
The front
The front: hinged at the tip of the jaw, the tongue flips out faster than a blink, and its saliva turns watery on impact, then thicker than honey to hold the insect on the way back.
Q 08Which North American species can spend the winter frozen solid, with no heartbeat or breathing?
Wood frog
Wood frogs flood their organs with glucose as antifreeze while ice forms under the skin and the heart stops; in Alaska they stayed frozen for about 193 days in a row, and every one thawed out alive.
Q 09Which fungal disease, first described in 1998, has devastated frog populations around the world?
Chytridiomycosis
Chytridiomycosis attacks the keratin in a frog's skin and upsets its salt and water balance; genetic detective work has traced the pandemic strain back to the Korean peninsula.
Q 10Which country imported cane toads from Hawaii in 1935 to eat sugar-cane beetles, with disastrous results?
Australia
Australia's toads bred fast and kept spreading, and their poison kills the native predators that try to eat them: northern quolls and water monitors crash wherever the toads arrive.
Q 11How do frogs drink water?
They absorb it through their skin
They absorb it through their skin, mostly at a thin 'drinking patch' on the belly and the underside of the thighs, so a frog drinks by sitting in water rather than swallowing it.
Q 12What is a group of frogs called?
An army
An army is the traditional collective noun, and it fits in spring, when frogs and toads migrate back to the ponds where they hatched, sometimes thousands at a time.
Q 13Which order, named from the Greek for 'without a tail', contains frogs and toads?
Anura
Anura joins the Greek an-, 'without', and oura, 'tail', because adult frogs lose the tail they swam with as tadpoles; salamanders, which keep theirs, sit in the order Caudata.
Q 21When a frog fires its tongue at prey, what is it mainly reacting to?
Its movement
Its movement: a frog's retina has 'bug detector' cells that fire when a small dark object moves across its view, and it must line the target up first because it shuts its eyes as the tongue shoots out.
Q 22What is the inflatable sac on a male frog's throat used for?
Amplifying mating calls
Amplifying mating calls: the sac is a resonating throat pouch, and because the frog shuttles the same air back and forth instead of breathing it out, it can call with its mouth and nostrils shut.
Q 23Which continent's first frog fossils were reported in 2020?
Antarctica
Q 14Wallace's flying frog of Southeast Asia glides from tree to tree using what?
Its huge webbed feet
Its huge webbed feet: the frog spreads the webbing between its long fingers and toes into four small parachutes and can steer a glide of up to 15 metres to a lower branch.
Q 15About how long is Paedophryne amauensis, the Papua New Guinea frog named the world's smallest vertebrate in 2012?
8 mm
About 8 mm: adults average 7.7 mm, and the frog was found only because researchers tracked an insect-like call into the leaf litter and bagged handfuls of it; a Brazilian flea toad has since measured even smaller.
Q 16What special adaptation allows tree frogs to climb smooth vertical surfaces?
Sticky toe pads
Sticky toe pads are kept wet with watery mucus that seeps from channels between their six-sided surface cells; the film is so thin that the pad also grips by direct friction, even on glass.
Q 17Which Colombian frog is often called the most poisonous animal in the world?
Golden poison frog
The golden poison frog is so toxic that Colombia's Emberá hunters poison their blowgun darts with its skin secretions; its scientific name, Phyllobates terribilis, says the rest.
Q 18What happens to a tadpole's tail during metamorphosis?
It is reabsorbed by the body
It is reabsorbed by the body, cell by cell, through programmed cell death; in most tadpoles the tail holds no bone, only soft tissue, which is thought to be why it can be absorbed so quickly.
Q 19What is the term for a frog's egg mass laid in water?
Frogspawn
Frogspawn floats in jelly-coated clumps, whereas toads lay long strings of eggs that swell as their jelly soaks up water and tangle around the stalks of pond plants.
Q 20Because they live both in water and on land, scientists treat frogs as what?
Bioindicators of ecosystem health
Bioindicators of ecosystem health: frogs sit in the middle of food chains, eating insects and feeding birds and snakes, so when a pond's frogs vanish it flags trouble above and below them.
Antarctica has no frogs today, but a hip bone and a piece of skull about 40 million years old show helmeted frogs lived there when it was warm and wet; their living relatives survive in Chile.
Q 24Why do many frogs have brightly colored skin?
To warn predators that they are toxic
To warn predators that they are toxic: the signal works so well that one harmless frog, Allobates zaparo, copies the colours of its poisonous neighbours and is left alone too.
Q 25Which branch of zoology covers frogs and the rest of the amphibians, plus reptiles?
Herpetology
Herpetology takes its name from the Greek herpeton, 'creeping thing': the science lumps frogs in with snakes and lizards because early naturalists filed all crawling animals together.
Q 26In which classic video game does the player help a frog cross a busy road and river?
Frogger
Frogger outlived the arcades: in a 1998 Seinfeld episode, George wheels a Frogger cabinet across a busy street to save his old high score, dodging cars just like the frog.
Q 27What is the primary way frogs breathe as adults?
Through both lungs and skin
Adult frogs breathe through both lungs and skin: the thin, moist skin lets oxygen pass straight into the blood, so a frog wintering at the bottom of a pond can get by on its skin alone.
Q 28Which Madagascan species puffs itself up and oozes a sticky white gum when threatened?
Tomato frog
The tomato frog's white gum is among the stickiest secretions of any amphibian: it clogs a predator's eyes and mouth until the attacker lets the bright red frog go.
Q 29What do tadpoles primarily eat before they become frogs?
Algae and plant matter
Algae and plant matter: most tadpoles scrape it off surfaces with horny tooth ridges and digest it in a long, coiled gut, which shortens as they switch to a frog's diet of live prey.
Q 30The African clawed frog (Xenopus laevis) was historically used for what unexpected purpose?
Pregnancy testing in humans
Pregnancy testing in humans: injected with a pregnant woman's urine, the frog laid eggs within hours; when chemical tests took over, labs let their frogs go, and the species is now invasive in many countries.