Frogs
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91 free Frogs trivia questions with answers — nature quiz, new questions added Aug 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 91 questions spanning species, anatomy, life cycles, conservation, and pop culture.
30 of 91 questions with answers and explanations. Play the quiz
Q 01What unique feature of glass frogs gives them their name?
Their translucent belly skin that reveals internal organs
Glass frogs (family Centrolenidae) get their name from the translucent skin on their underside, through which their internal organs — including the heart, liver, and intestines — are visible. Their backs are typically lime green for camouflage on leaves.
Q 02What is the process called when a tadpole transforms into a frog?
Metamorphosis
Metamorphosis is the biological process through which a tadpole undergoes dramatic physical changes — losing its tail, growing legs, and developing lungs — to become an adult frog.
Q 03How do most male frogs attract females during mating season?
By calling or croaking
Male frogs attract females mainly by calling or croaking — chirps, trills and croaks made by pushing air over the vocal cords — and each species has a distinctive call that females recognise.
Q 04In everyday usage, what most often marks an anuran out as a 'toad' rather than a 'frog'?
Dry, warty skin and a land-based life
'Toad' is an informal label for terrestrial species with dry, warty skin, while 'frog' usually means a smooth, moist-skinned swimmer. The split is cosmetic: the smooth-skinned Panamanian golden frog is a true toad, and the warty fire-bellied toad is not.
Q 05Frogs belong to which class of animals?
Amphibians
Frogs are amphibians, belonging to the class Amphibia and the order Anura. Like other amphibians, they typically begin life in water as larvae (tadpoles) and undergo metamorphosis to live on land as adults.
Q 06Which species from Cameroon and Equatorial Guinea is the world's largest, weighing up to 3.3 kg?
Goliath frog
Conraua goliath reaches about 35 cm from snout to vent, and with legs outstretched the biggest specimens exceed 80 cm. Its eyes alone can be nearly 2.5 cm across.
Q 07What do frogs primarily use their long, sticky tongues for?
Catching insects
Frogs use their long, sticky tongues to catch insects and other small prey. A frog's tongue can shoot out and retract in less than a tenth of a second, faster than the human eye can follow.
Q 08Which North American species can spend the winter frozen solid, with no heartbeat or breathing?
Wood frog
Rana sylvatica tolerates 65–70% of its body water turning to ice, packing its cells with glucose and urea as antifreeze. Alaskan wood frogs have stayed frozen for around 193 consecutive days and thawed out fine.
Q 09What fungal disease has been devastating frog populations worldwide since the late 1990s?
Chytridiomycosis
Chytridiomycosis, caused by the fungus Batrachochytrium dendrobatidis, attacks the keratin in amphibian skin and disrupts water and electrolyte balance. Genome studies point to a lineage from the Korean peninsula as the likely seed of the global outbreak.
Q 10Which country imported 102 cane toads from Hawaii in 1935 to eat sugar-cane beetles, with disastrous results?
Australia
Australia's toads largely ignored the grey-backed cane beetle they were hired to eat, and by 2011 were estimated at more than 200 million.
Q 11How do frogs drink water?
They absorb it through their skin
The permeable skin does the work, especially a patch on the belly and thighs; the same leakiness means they lose water too.
Q 12What is a group of frogs called?
An army
A group of frogs is an army; a group of toads is a knot. Both terms are recorded by the US Geological Survey's list of animal group names.
Q 13What is the scientific order name for frogs and toads?
Anura
Anura (meaning 'tailless' in Greek) is the order that includes all frogs and toads. Caudata is the order for salamanders, Gymnophiona for caecilians, and Squamata for lizards and snakes.
Q 21When a frog fires its tongue at prey, what is it mainly reacting to?
Its movement
A frog's distance vision beats its near vision, so it lines up a small moving target and then shuts its eyes as the tongue shoots out. Despite the old myth, frogs do see in colour, even in very low light.
Q 22What is the inflatable sac on a male frog's throat used for?
Amplifying mating calls
The vocal sac on a male frog's throat acts as a resonating chamber to amplify mating calls. When the frog calls, air is pumped from the lungs over the vocal cords and into the sac, which inflates like a balloon and projects the sound over longer distances.
Q 23How does the male Darwin's frog look after his young?
Q 14Approximately how many known species of frogs exist worldwide?
Over 7,000
There are over 7,000 known species of frogs, making them one of the most diverse groups of vertebrates. New species are still being discovered regularly, particularly in tropical rainforests.
Q 15Which Papua New Guinea species was announced in 2012 as the world's smallest vertebrate?
Paedophryne amauensis
At 7.7 mm from snout to vent, Paedophryne amauensis was hailed as the tiniest vertebrate on Earth in 2012. Its title has since been challenged by the Brazilian flea toad, measured even smaller in 2024.
Q 16What special adaptation allows tree frogs to climb smooth vertical surfaces?
Sticky toe pads
Tree frogs have specialized toe pads that use wet adhesion — a thin layer of mucus between the pad and the surface creates capillary forces, allowing them to cling to smooth surfaces like glass. The pads also have microscopic channels that maintain grip in wet conditions.
Q 17Which Colombian species is considered the most poisonous animal on the planet?
Golden poison frog
The golden poison frog (Phyllobates terribilis) of Colombia's Pacific lowlands carries about one milligram of batrachotoxin in its skin, enough to kill 10 to 20 humans.
Q 18What happens to a tadpole's tail during metamorphosis?
It is reabsorbed by the body
It is reabsorbed by the body through apoptosis, programmed cell death, and the recycled nutrients help fuel the new legs.
Q 19What is the term for a frog's egg mass laid in water?
Frogspawn
Frogspawn refers to the jelly-like mass of eggs that frogs lay in water. Each egg is surrounded by a protective layer of clear jelly. A single female frog can lay thousands of eggs at once, though the vast majority will not survive to adulthood.
Q 20Because of their permeable skin and two-habitat life, scientists treat frogs as what?
Bioindicators of ecosystem health
Trouble in either habitat shows up in frogs early, which is why they are called bioindicators of ecosystem health, a natural early-warning system for pollution.
He broods tadpoles in his vocal sac
The male Darwin's frog (Rhinoderma darwinii) from Chile scoops up developing eggs and carries them in his vocal sac, where the tadpoles complete their development. Once they metamorphose into tiny froglets, he opens his mouth and they hop out.
Q 24Which continent has no native frog species?
Antarctica
Antarctica is the only continent with no native frog species. Frogs are found on every other continent, though they are most diverse in tropical regions. The extreme cold and lack of freshwater habitats make Antarctica inhospitable for amphibians.
Q 25Why do many frogs have brightly colored skin?
To warn predators that they are toxic
Bright colours in frogs are usually aposematism, a warning that the wearer is toxic or foul-tasting. Camouflaged species go the other way, with dappled browns and greens and warty skin folds that break up their outline.
Q 26Which branch of zoology covers frogs and the rest of the amphibians, plus reptiles?
Herpetology
Herpetology is the branch of zoology that studies amphibians and reptiles. The name comes from the Greek word 'herpeton' meaning 'creeping animal.' Scientists who study frogs are called herpetologists.
Q 27In which classic video game does the player help a frog cross a busy road and river?
Frogger
Frogger, released by Konami in 1981, is an arcade classic where players guide a frog across a busy highway and a river filled with hazards. It became one of the most recognizable games of the early arcade era.
Q 28What is the primary way frogs breathe as adults?
Through both lungs and skin
Adult frogs breathe through both lungs and skin: the thin, moist, permeable skin lets oxygen pass straight into the bloodstream, and a frog overwintering underwater relies on its skin alone.
Q 29Which Madagascan species puffs itself up and oozes a sticky white gum when threatened?
Tomato frog
The tomato frog (Dyscophus antongilii) is endemic to Madagascar and gets its name from its round body shape and bright reddish-orange color. When threatened, it puffs up its body and secretes a thick, sticky white substance from its skin.
Q 30What do tadpoles primarily eat before they become frogs?
Algae and plant matter
Most tadpoles are herbivorous, feeding primarily on algae and aquatic plant matter. They have specialized mouthparts for scraping algae from rocks and plants. As they metamorphose, their diet shifts to insects and other animal prey.