Snake Trivia
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108 free Snake trivia questions with answers — nature quiz, new questions added Oct 2026.
51 free Snake trivia questions with answers. Snakes turn up in more of our stories than almost any other animal, from the Garden of Eden to Indiana Jones, and this quiz covers the real creatures as thoroughly as the legends. You will meet the world's longest, heaviest, smallest and most venomous snakes, learn how a snake smells with its tongue and hears without ears, and find out which countries have no snakes at all and why the story about St Patrick does not hold up. The early questions are easy enough for a curious eight-year-old, the middle ones suit a pub quiz crowd, and the last stretch will test anyone who has kept snakes or studied herpetology. Every answer was checked against Wikipedia and other reference sources before publishing, and each question shows its explanation and citation after you answer. Play it for a shareable score, use it as a classroom warm-up for a reptile unit, or drop it into trivia night as an animal round nobody will forget.
30 of 108 questions with answers and explanations. Play the quiz
Q 01The common adder, the world's northernmost snake, crosses the Arctic Circle in which region?
Scandinavia
Scandinavia is where the common adder ranges beyond the Arctic Circle, the only snake found that far north; it copes by hibernating through the long winter and basking in the sun to warm up.
Q 02What does a snake do with its forked tongue?
Collect scent particles
Collect scent particles: that is the job of the forked tongue, which flicks out, picks up chemical traces from air or ground, and delivers them to the vomeronasal organ in the roof of the mouth.
Q 03The vomeronasal organ in the roof of a snake's mouth is commonly known by which anatomist's name?
Jacobson's
Jacobson's organ honours the Danish anatomist Ludwig Jacobson, who published on it in the early 1800s, yet his find was a rediscovery: the Dutchman Frederik Ruysch had described it generations earlier.
Q 04Instead of movable eyelids, what covers a snake's eyes?
A transparent scale
A transparent scale called the brille or spectacle covers each eye; it is shed with the rest of the skin, which is why a snake's eyes turn cloudy before a molt.
Q 05How does a snake shed its skin?
In one complete piece
In one complete piece, ideally: the old layer peels back from the snout and comes off like a sock turned inside out, and a healthy adult may shed several times a year.
Q 06Roughly how many snake species were known by 2026?
About 4,000
About 4,000 species are known, and the list grows by dozens a year as new snakes are described; despite their fearsome reputation, most of them are non-venomous.
Q 07Which species is the world's longest venomous snake?
King cobra
King cobra: when cornered it can lift the front third of its body off the ground, high enough to look a standing adult in the eye, and still move forward to strike.
Q 08The world's longest venomous snake is the only one known to do what when breeding?
Build an above-ground nest
Build an above-ground nest is this snake's unique habit: the female rakes leaf litter into a mound, lays her clutch inside and guards it through incubation, unlike most snakes, which abandon theirs.
Q 09The black mamba's body is olive or grey, so which part gives it its name?
The inside of its mouth
The inside of its mouth is inky black, and the snake gapes to show it as a threat display; it is also Africa's longest venomous snake.
Q 10Which shy Australian snake is considered the most venomous in the world by the LD50 test in mice?
Inland taipan
Inland taipan venom tops the mouse LD50 scale, with one bite estimated to hold enough to kill a hundred adults, yet bites are very rare because it lives in remote outback and spends little time above ground.
Q 11What is the longest snake species alive today?
Reticulated python
Reticulated python is the longest snake yet not the heaviest: it is so much slimmer than the bulkiest species that a shorter rival can weigh almost twice as much.
Q 12Which South American snake is the heaviest in the world?
Green anaconda
Green anaconda bulk is carried by water: the snake is cumbersome on land but sleek and stealthy in the swamps and slow rivers where it spends most of its time, and females far outgrow males.
Q 13Blair Hedges, who named the tiny Barbados threadsnake in 2008, said it was about as wide as what?
A spaghetti noodle
Q 21Which body part do snakes rest on the ground to pick up vibrations in stereo?
Their lower jaw
Their lower jaw, resting on the ground, carries vibrations to the inner ear; the two halves of the jaw move independently, so the snake can tell which side a vibration comes from.
Q 22Snake venom is a modified form of what?
Saliva
Saliva is what venom evolved from: the glands behind each eye are modified salivary glands, and a snake can meter the dose, sometimes delivering a 'dry bite' with no venom at all.
Q 23Albert Calmette's 1890s antivenom, the first sold commercially, was produced by immunising which animals?
Horses
Horses were injected with cobra venom until they built up immunity, and serum drawn from their blood became Calmette's 'Sérum Antivenimeux', the first antivenom on sale.
A spaghetti noodle was his comparison; the snake is so small that a female produces just one offspring at a time, and it emerges already about half her size.
Q 14In which country's coal mine were the fossils of the giant snake Titanoboa discovered?
Colombia
Colombia's Cerrejón coal mine yielded Titanoboa, some 13 metres long; its describers calculated that a cold-blooded snake so large needed a climate averaging at least 30 °C, hotter than tropical forests today.
Q 15Which of these island nations has no native land snakes?
New Zealand
New Zealand has no land snakes at all, although sea snakes and sea kraits occasionally drift into its northern waters; its native land reptiles are lizards and the tuatara.
Q 16Legend credits St Patrick, but what really kept snakes out of Ireland?
Rising seas after the Ice Age
Rising seas after the Ice Age cut Ireland off before snakes spreading north through Britain could cross; the Roman writer Solinus noted that it had none in the third century, long before Patrick.
Q 17Ilha da Queimada Grande, an Atlantic island closed to the public, is home to thousands of which snakes?
Golden lancehead vipers
Golden lancehead vipers live nowhere else; with no ground mammals to hunt they prey on migrating birds, and their venom is fast-acting and up to five times as potent as mainland relatives'.
Q 18The rattle on a rattlesnake's tail is made of what?
Hollow keratin segments
Hollow keratin segments, loosely interlocked, make up the rattle; a new segment is added each time the snake sheds, and the pieces click against each other when the tail vibrates.
Q 19Rattlesnakes are native only to which part of the world?
The Americas
The Americas are the rattlesnake's only home, from southern Canada to central Argentina, and the snake became an emblem of the American Revolution, coiled on the Gadsden flag above 'Don't Tread on Me'.
Q 20What does the small pit in front of each eye on pit vipers such as rattlesnakes sense?
Infrared heat
Infrared heat is what the loreal pits detect, well enough that a blindfolded rattlesnake can still strike warm prey accurately in total darkness.
Q 24Which snake family includes the cobras, mambas and coral snakes?
Elapidae
Elapidae snakes have front fangs that stay permanently erect, whereas a viper's sit on a rotating bone and fold away, which is what lets vipers carry far longer ones in the same small mouth.
Q 25In Greek myth, which hero beheaded Medusa, the Gorgon with snakes for hair?
Perseus
Perseus, in the usual telling, watched Medusa's reflection in a polished shield lent by Athena, later turned his enemies to stone with the severed head, then gave it to the goddess for her aegis.
Q 26What is the ancient symbol of a snake eating its own tail called?
Ouroboros
Ouroboros, from the Greek for 'tail-devouring', appears on a shrine in Tutankhamun's tomb, and the chemist August Kekulé said a daydream of a snake seizing its own tail showed him benzene's ring.
Q 27The two-snake caduceus, often mistaken for medicine's one-snake Rod of Asclepius, is the staff of which Greek god?
Hermes
Hermes, herald of the gods and patron of merchants, carries the caduceus and has no link to healing; the confusion spread after the US Army Medical Corps adopted it as its insignia.
Q 28The rearing serpent worn on the crowns of Egyptian pharaohs is called what?
Uraeus
Uraeus is the emblem of the goddess Wadjet, protector of Lower Egypt; once the country was unified, the vulture of Upper Egypt's Nekhbet joined it on the crown to show rule over both lands.
Q 29In Norse myth, the world-encircling serpent that bites its own tail is which god's child?
Loki
Loki fathered Jörmungandr with the giantess Angrboða; Odin cast the serpent into the sea, where it grew until it circled the world, and at Ragnarök it and Thor are fated to kill each other.
Q 30The board game Snakes and Ladders originated in which country as a lesson about virtue and vice?
India
India is where the game began as Moksha Patam; when Milton Bradley brought it to America in 1943 as Chutes and Ladders, playground slides took the place of the snakes.