Reptiles
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98 free Reptiles trivia questions with answers — nature quiz, new questions added Oct 2026.
50 free reptiles trivia questions with answers. Think you know everything about reptiles? Test your knowledge with our comprehensive trivia quiz covering snakes, lizards, turtles, crocodilians, and more. Whether you're a wildlife enthusiast or just curious about these fascinating cold-blooded creatures, this quiz offers an entertaining way to learn interesting reptile facts and expand your understanding of the animal kingdom.
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Q 01What term describes animals, such as reptiles, that rely on outside heat like sunshine to warm their bodies?
Ectothermic
Ectothermic animals take their warmth from outside and so burn far less fuel: a reptile gets by on a fraction of the food a mammal of the same size must eat.
Q 02What is the process called when a reptile sheds its skin?
Ecdysis
Ecdysis recurs throughout a reptile's life: a snake may moult several times a year, the pace set by its age, the weather and how well it has been feeding.
Q 03Sea turtle hatchlings find the sea by crawling toward what?
Brightest horizon
The brightest horizon is naturally the open sky over the sea, so beachfront lamps can lure hatchlings the wrong way; that is why many nesting coasts restrict lighting.
Q 04Which snakes have hinged fangs that fold back when not in use?
Vipers
Vipers lay their long hollow fangs flat against the roof of the mouth, then swing them forward into biting position as the jaws gape wide.
Q 05A Komodo dragon can swallow up to what share of its own body weight in a single meal?
80%
80%: a loosely hinged jaw and a stomach that stretches let the dragon bolt its prey in huge chunks, so one kill can leave it carrying nearly double its usual weight.
Q 06To which order do the turtles belong?
Testudines
Testudines covers turtles, tortoises and terrapins alike; the shell is their own ribcage and backbone fused into armour, so, whatever cartoons suggest, a turtle can never climb out of it.
Q 07Which reptile, native to New Zealand, is the only surviving member of the order Rhynchocephalia?
Tuatara
Tuatara look like lizards but are the last of a separate order that flourished alongside the dinosaurs; every other member died out about 60 million years ago.
Q 08Colour change in chameleons helps with camouflage, but its most common function is what?
Social signalling
Social signalling is the main driver: a chameleon brightens to court a mate or intimidate a rival and darkens in submission; colour also shifts with temperature, darkening to absorb heat.
Q 09Sidewinding is a snake gait used for crossing what kind of surface?
Loose, slippery sand
Loose, slippery sand suits sidewinding because the snake sets its body down in sections that press without sliding; on a steeper dune it simply lays more of its length on the surface.
Q 10How many chambers do most non-crocodilian reptiles have in their heart?
Three
Three chambers, two atria and one partly divided ventricle, let oxygen-rich and oxygen-poor blood mix; in pythons and monitor lizards a ridge closes with each beat, so the heart pumps as if it had four.
Q 11Crocodiles excrete excess salt through modified salivary glands located where?
On the tongue
On the tongue sit a crocodile's salt glands, found only in 1981 after long puzzling zoologists; alligators have no working ones, which is why they can stand sea water only briefly.
Q 12The word 'alligator' is likely an anglicised form of the Spanish phrase el lagarto, meaning what?
The lizard
The lizard: English borrowed the Spanish el lagarto in the 1560s and ran the article into the noun, writing 'alagarto' and 'allagarta' before 'alligator' won out.
Q 13What protein forms the tough outer layer of reptile scales?
Keratin
Keratin, the protein of human hair and nails, hardens a reptile's scales; they grow from the outer skin itself, whereas a fish's scales form in the deeper layer beneath.
Q 21Harriet, who died at Australia Zoo in 2006 at an estimated 175 years old, was which kind of reptile?
Galapagos Tortoise
Galapagos tortoise Harriet was long billed as a pet Charles Darwin collected on the Beagle voyage, but her subspecies lives only on an island he never visited.
Q 22Which slow snake gait moves the body forward using only the belly scales, without bending?
Rectilinear locomotion
Rectilinear locomotion needs no bending: muscles haul the belly skin forward and anchor it while the ribs, once thought to 'walk', stay still, so a heavy boa can creep ahead in a dead straight line.
Q 23What powers the launch of a chameleon's tongue?
Q 14What is a common food item for many garter snake species?
Earthworms
Earthworms are a staple, but some garter snakes also swallow rough-skinned newts, whose skin toxin stops most predators: the snakes have evolved resistance to it.
Q 15Which species is the largest living reptile, with big males reaching six metres or more?
Saltwater crocodile
Saltwater crocodiles are the largest living reptiles and true sea-goers: they ride surface currents on long ocean voyages, which is how they came to live on islands across the region.
Q 16What is generally considered the longest snake species in the world?
Reticulated Python
Reticulated pythons of Southeast Asia are the longest snakes but not the heaviest: the green anaconda, though slightly shorter, has such girth that it can weigh almost twice as much.
Q 17Which sea turtle, the largest of all living turtles, feeds mainly on jellyfish?
Leatherback
Leatherback turtles are the only sea turtles without a hard shell: the back is covered in tough, rubbery skin, which is what gives them their name.
Q 18Compared with crocodiles, alligators and caimans generally have snouts of which shape?
U-shaped
U-shaped and broad, an alligator's upper jaw overlaps the lower, so its bottom teeth vanish when the mouth shuts; a crocodile's narrower, V-shaped jaws leave both rows on show.
Q 19Which is the only venomous lizard native to the United States?
Gila Monster
Gila monster venom has earned the slow, heavy desert lizard some gratitude: a compound found in it was copied to make exenatide, a drug for type 2 diabetes.
Q 20The deep pits between a rattlesnake's eyes and nostrils are organs for sensing what?
Body heat
Body heat: the pits pick up infrared so finely that a rattlesnake can strike warm-blooded prey accurately even in total darkness.
Stretched elastic tissue
Stretched elastic tissue: muscle slowly loads springy tissue in the tongue, which recoils like a bow, so the strike stays fast even on a cold morning when muscle is sluggish.
Q 24What is the light-sensing 'third eye' on top of the head of many lizards called?
Parietal eye
Parietal eyes have a retina of their own but probably form no image; they gauge daylight, likely helping to set the animal's daily rhythm, and are named for the skull bones around the opening.
Q 25Snakes never blink, so what protects their eyes?
Clear scales
Clear scales, called brilles or spectacles, cover each eye like fixed contact lenses and come away with the rest of the skin at every moult.
Q 26Beyond protection, what is a primary function of scales on most reptiles?
Preventing water loss
Preventing water loss is the key job: the horny, watertight skin seals moisture in, which is what let reptiles, unlike amphibians, live their whole lives on dry land.
Q 27In crocodiles and alligators, what decides whether an egg hatches male or female?
Nest temperature
Nest temperature decides it: alligator eggs kept at about 31 °C or cooler hatch as females, slightly warmer ones as mostly males, and the hottest nests swing back to females.
Q 28What are the upper and lower parts of a turtle's shell called?
Carapace and Plastron
Carapace and plastron are joined at each side; in box turtles the plastron is hinged as well, so the animal can pull in its head and legs and shut itself almost completely inside.
Q 29How do snakes typically shed their outer skin?
In one piece
Snakes shed in one piece: the old skin peels back from the head and turns inside out as the snake crawls free, like a dust jacket sliding off a book.
Q 30Komodo dragons were long said to kill with septic saliva, but what did a 2009 MRI study find in their jaws?
Venom glands
Venom glands in the lower jaw showed up on the scan, and their toxins stop blood clotting and bring on shock; the same team rejected the old idea that mouth bacteria do the killing.