Rainforests
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49 free Rainforests trivia questions with answers — nature quiz, new questions added Aug 2026.
42 free rainforests trivia questions with answers. Jungle trivia usually stops at 'the Amazon is big'. This quiz goes further: where the word jungle actually comes from, why a real rainforest interior is surprisingly easy to walk through, how much of the Amazon's fertiliser blows in from the Sahara, and which president gave piranhas their reputation. It covers the three great tropical forests, the Amazon, the Congo Basin and Australia's ancient Daintree, plus temperate rainforests and the forest peoples of Africa and Borneo. The animal rounds are the fun part: jaguars, sloths and their algae, poison dart frogs, harpy eagles, orangutans, okapis, capybaras, leafcutter and bullet ants, tarsiers, mountain gorillas, the stinking hoatzin and the pink river dolphin. There are plants too, from the largest single flower on Earth to the kapok fibre once stuffed into life jackets and the rubber seeds smuggled to Kew. Every answer was checked against Wikipedia and carries a citation. Difficulty ranges from questions an eight-year-old naturalist will get to ones that need a field guide.
30 of 49 questions with answers and explanations. Play the quiz
Q 01After the Amazon, the world's second-largest tropical rainforest lies in which river basin?
Congo
The Congo Basin holds the second-largest tropical rainforest, about 2 million km² across six countries, roughly a third the extent of the Amazon, with some of the largest undisturbed stands on the planet.
Q 02The Amazon rainforest lies on which continent?
South America
The Amazon rainforest lies entirely in South America, spread across Brazil, Peru, Colombia and several neighbouring countries.
Q 03What is the uppermost stratum of a rainforest, where the tallest trees rise above the rest, called?
Emergent layer
The emergent layer consists of scattered giants such as kapok trees that rise above the continuous canopy, exposed to strong winds, full sun and low humidity, with small leaves and buttressed trunks.
Q 04Many rainforest plants have leaves with a 'drip tip.' What is the primary purpose of this adaptation?
To shed excess rainwater
Drip tips are an adaptation in rainforest plants that allow water to run off the leaves quickly, preventing the growth of fungi and algae that could block sunlight and hinder photosynthesis.
Q 05Which big cat is the apex predator of the Amazon rainforest?
Jaguar
The jaguar is the biggest cat in the Americas and the third largest in the world, ranging from the southwestern United States to northern Argentina.
Q 06What is considered the leading cause of deforestation in tropical rainforests globally?
Agricultural expansion
Agricultural expansion, above all cattle ranching and crops like soy and palm oil, is the primary driver of rainforest loss worldwide; logging adds to the fragmentation.
Q 07What is the typical average annual rainfall in a tropical rainforest?
1750-3000 mm
Tropical rainforests are defined by their high precipitation, typically receiving between 1,750 mm and 3,000 mm of rain annually, though some areas can receive much more.
Q 08Which country has the largest share of the Amazon rainforest within its borders?
Brazil
Brazil is home to the largest portion of the Amazon rainforest, containing approximately 60% of its total area.
Q 09Despite their dense vegetation, what are most tropical rainforest soils like?
Heavily leached and nutrient-poor
Rainforest soils are heavily leached and nutrient-poor: constant rain washes soluble nutrients away, so most minerals sit in the living plants and the thin litter layer on top.
Q 10The English word 'jungle' comes from a Sanskrit word meaning what?
Rough and arid
Sanskrit jaṅgala meant 'rough and arid' land or dry scrub; the word reached English in the 18th century via Hindustani, and its meaning drifted to dense tropical tangle along the way.
Q 11Ecologists distinguish a jungle from a rainforest interior mainly by what?
Its dense, tangled ground-level vegetation
Under a closed canopy so little light reaches the floor that a mature rainforest is fairly easy to walk through; the tangle grows where light gets in.
Q 12Before the 1970s, roughly what share of print references to tropical forests said 'jungle' rather than 'rainforest'?
Over 80%
A corpus study found 'jungle' in over 80% of print references before the 1970s; 'rainforest' only entered English dictionaries that decade, as these forests came to be seen as fragile rather than menacing.
Q 13Theobroma cacao, the source of chocolate, is native to the rainforests of which region?
Q 21The Daintree takes its name from Richard Daintree, who was what?
A geologist and photographer
Richard Daintree (1832–78) was a Queensland government geologist and pioneering field photographer; in 2021 the eastern Kuku Yalanji people won formal ownership of over 160,000 hectares, including the national park.
Q 22The tropical rainforest biome lies roughly between which two lines of latitude?
The Tropics of Cancer and Capricorn
The tropical rainforest biome lies roughly between the Tropics of Cancer and Capricorn; temperate rainforests exist far outside that band, from Chile and the Pacific Northwest to the west coasts of Scotland and Ireland.
Q 23The Mbuti, Efe, Aka and Baka peoples are hunter-gatherers of the rainforests of which region?
The Amazon basin
Theobroma cacao originated in the upper Amazon basin, where wild populations show the greatest genetic diversity and use dates back some 5,300 years; West Africa only received the tree in the 19th century.
Q 14The Amazon rainforest spans the territory of how many nations?
Nine
Nine: Brazil, Peru, Colombia, Venezuela, Ecuador, Bolivia, Guyana, Suriname and France via French Guiana; Peru holds the second-largest share after Brazil, at about 13%.
Q 15Roughly how many individual trees are estimated to grow in the Amazon rainforest?
390 billion
A 2013 estimate put the Amazon at about 390 billion individual trees of some 16,000 species; the region also holds an estimated 2.5 million insect species.
Q 16Much of the phosphorus that fertilises the Amazon arrives as dust blown from where?
The Sahara desert
More than half of it comes from a single dry lakebed, the Bodélé depression in Chad, and NASA satellites track the plume across the Atlantic.
Q 17Who was the first European to travel the length of the Amazon River, in 1542?
Francisco de Orellana
Francisco de Orellana named the river after the warrior women of Greek myth following a fight with local tribes in 1542; his reports of large riverside cities were long dismissed as exaggeration.
Q 18The claim that the Amazon produces a fifth of the world's breathable air misuses a figure for what?
Oxygen turnover
The figure refers to gross oxygen turnover: rainforests consume nearly all the oxygen they make through respiration and decomposition, so their net contribution to the atmosphere is close to zero.
Q 19By 2022, roughly what fraction of the Amazon rainforest had already been deforested?
About 20%
A 2022 study put irreversible loss at about 20% of the original forest, with a further 6% highly degraded; the Trans-Amazonian highway of the 1970s opened much of it up.
Q 20The Daintree Rainforest, among the oldest rainforests on Earth, is in which country?
Australia
The Daintree lies in Queensland, Australia, about 105 km north of Cairns, and is one of the few places where rainforest runs straight down to coral-fringed beaches.
Central Africa
All four live in the Congo Basin forests of Central Africa, the Mbuti and Efe in the DR Congo's Ituri, the Aka and Baka in Congo, Cameroon and Gabon; the Dayak and Penan are Borneo's forest peoples.
Q 24Which snake, the world's heaviest, hunts in Amazon rivers and swamps?
Green anaconda
The green anaconda is the world's heaviest snake, with large females exceeding 5 metres and 100 kg; it ambushes capybara and caiman from Amazon rivers and swamps.
Q 25The grooved hair of a sloth's coat hosts what, giving the animal a greenish camouflage?
Symbiotic algae
The same growth feeds sloth moths, some species of which live nowhere else; the sloth itself only climbs down about once a week to defecate.
Q 26Of more than 170 poison dart frog species, how many are documented as used to poison blowdarts?
Four
All four belong to the genus Phyllobates; curare from plants was the more usual dart poison.
Q 27The golden poison frog carries enough toxin on average to kill roughly how many people?
Ten to twenty
An average golden poison frog carries about one milligram of batrachotoxin, enough to kill ten to twenty people; the toxin comes from a diet of ants, mites and termites, so captive-bred frogs are harmless.
Q 28The harpy eagle, the largest bird of prey in its range, hunts from which layer of the rainforest?
The upper emergent canopy
Harpy eagles nest in emergent trees such as kapoks and hunt sloths and monkeys in the upper canopy; logging has all but wiped them out of Central America outside pockets of Panama and Costa Rica.
Q 29Wild orangutans are native to which two islands?
Borneo and Sumatra
Orangutans survive in the wild only on Borneo and Sumatra; a third species, the Tapanuli orangutan of Sumatra, was only described in 2017.
Q 30The okapi of the Congo rainforest, striped like a zebra, is most closely related to which animal?
The giraffe
The okapi is the giraffe's only living relative, the two making up the family Giraffidae; Europeans had heard rumours of an 'African unicorn' for years before it was formally described in 1901.