Quiz of the Day
World Snake Day
Thursday, 16 July 2026
Fangs, forked tongues, and fascinating facts — the secret lives of Earth's most misunderstood reptiles
1. How many species of snake are there on Earth, approximately?
- Around 2,000
- Around 3,700
- Around 5,500
- Around 1,000
Of Earth's roughly 3,700 snake species, fewer than 600 are venomous, and only about 200 are considered dangerous to humans. Most snakes are harmless constrictors or non-venomous hunters. The fear of snakes (ophidiophobia) is thought to be partially innate — humans evolved alongside snakes for millions of years.
2. The black mamba, Africa's most feared snake, is named for the colour of what?
- Its venom
- Its skin
- Its scales when wet
- The inside of its mouth
Black mambas are actually grey or brown on the outside — the name comes from the inky black interior of their mouths, displayed as a warning when threatened. They're the world's fastest land snake, reaching speeds of 20 km/h over short distances, and their venom can kill an adult human in as little as 20 minutes without antivenom.
3. Which is the world's longest snake species?
- Burmese python
- Reticulated python
- Green anaconda
- African rock python
Reticulated pythons are the world's longest snakes, regularly exceeding 5 metres and occasionally approaching 7 metres or more. The green anaconda holds the record for heaviest snake. A large reticulated python can constrict and swallow a prey animal as large as a pig or small deer whole.
4. Snakes detect heat from warm-blooded prey using specialised pit organs. Which family of snakes is most famous for these organs?
- Mambas
- Pit vipers
- Boas
- Cobras
Pit vipers (rattlesnakes, copperheads, cottonmouths) have heat-sensing pit organs between their eyes and nostrils that detect infrared radiation. This gives them a kind of thermal 'vision' that allows them to strike accurately in complete darkness. Pythons have similar but more numerous labial pits along their lips.
5. The king cobra is the world's longest venomous snake. What does it primarily eat?
- Rodents and birds
- Fish and amphibians
- Other snakes
- Frogs and lizards
King cobras are ophiophagous — snake-eaters — and their scientific name Ophiophagus hannah literally means 'snake-eating.' They're immune to the venom of many of their prey species. Despite their fearsome reputation, king cobras are actually shy and prefer to avoid humans, fleeing if given the opportunity.
6. A snake's forked tongue serves what primary purpose?
- Communicating with other snakes
- Regulating body temperature
- Collecting scent particles to 'smell' the environment
- Tasting food directly
Snakes flick their forked tongues to collect airborne and ground molecules, then insert the tips into the Jacobson's organ (vomeronasal organ) in the roof of their mouth. The two tips allow them to detect directional scent gradients — essentially smelling in stereo — allowing them to track prey or navigate.
7. What is the process by which snakes shed their skin called?
- Exuviation
- Keratinisation
- Ecdysis
- Metamorphosis
Snakes shed their entire outer skin in one piece, including the transparent eye scales (which temporarily make them look milky-eyed and vulnerable). Young snakes shed frequently as they grow — sometimes every 2-3 weeks. The shed skin is a perfect replica of the snake's scales, including the patterning.
8. Which country has the most venomous snake species in the world?
- Brazil
- Australia
- India
- Africa (continent)
Australia is home to more species of venomous snakes than any other country — including 21 of the world's 25 most venomous. Paradoxically, Australia has one of the world's lowest snake bite death rates, partly because its remote snake-rich areas are sparsely populated and antivenom is widely available.
9. The inland taipan is considered the world's most venomous land snake. How many adult humans could its maximum venom yield theoretically kill?
- 250
- 25
- 5
- 100
The inland taipan's venom is extraordinarily potent — its maximum yield in a single bite could theoretically kill over 100 adult humans or 250,000 mice. Despite this, no human has ever died from an inland taipan bite, largely because it lives in remote, sparsely populated regions of central Australia and is not aggressive.
10. The caduceus — a staff with two snakes and wings — is widely used as a symbol of medicine, though it properly belongs to which god?
- Dionysus
- Asclepius
- Apollo
- Hermes
The caduceus is the staff of Hermes, the messenger god — it has nothing to do with medicine. The true medical symbol is the Rod of Asclepius, the god of healing, which has a single snake. The medical caduceus error originated in the early 20th century US Army and has persisted despite being technically incorrect.
11. Which venomous snake is responsible for the most human deaths globally each year?
- King cobra
- Saw-scaled viper
- Black mamba
- Russell's viper
The saw-scaled viper (Echis carinatus) is responsible for more human deaths than any other snake, primarily in South Asia and the Middle East. It's nocturnal, aggressive, lives near human habitation, and produces a potent hemotoxic venom. Its name comes from the rasping sound it makes with its scales when threatened.
12. What unique adaptation allows the flying snake of Southeast Asia (Chrysopelea) to glide through the air?
- Spinning motion to generate lift
- Ability to catch thermals like birds
- Flattened body that undulates while falling
- Thin wing-like membranes between scales
Flying snakes launch from tree branches, flatten their cylindrical bodies into a concave cross-section, and undulate side to side as they fall. This creates aerodynamic lift and allows them to glide up to 10 metres, sometimes manoeuvring around obstacles. Researchers have found they're actually better gliders than flying squirrels over longer distances.
13. The ancient symbol of a snake eating its own tail — representing infinity and cyclicality — is known as what?
- Ouroboros
- Kundalini
- Caduceus
- Serpentine
The ouroboros symbol appears in ancient Egyptian texts, Greek manuscripts, alchemical writings, and Norse mythology (as Jörmungandr, the world serpent). Jung saw it as an archetype representing the unconscious. It's now used in diverse modern contexts, from infinity symbols to chemistry (Kekulé claimed the ring structure of benzene came to him in a dream of a snake eating its tail).
14. Antivenom is produced by injecting venom into which animal and collecting its antibodies?
- Horses
- Goats
- Rabbits
- Pigs
Horses are used because of their large blood volume — they can produce substantial quantities of antibody-rich serum. Small amounts of venom are injected repeatedly over weeks, triggering an immune response. The horse's blood is then harvested, the antibodies purified, and the resulting antivenom administered intravenously to bite victims.
15. Ireland, New Zealand, and Hawaii share which distinction related to snakes?
- They have no native snake species
- They have the world's most venomous sea snakes
- They have the world's highest snake bite rates
- They have recently introduced snake species
Ireland's lack of snakes is often attributed to St. Patrick driving them out — actually a metaphor for driving out paganism. The real reason is post-Ice Age isolation: snakes simply didn't recolonise Ireland after the glaciers retreated because the sea formed before they could migrate. New Zealand and Hawaii have no land snakes for similar reasons — they were too isolated.