96 Fun Facts About Wildlife

What is the fastest land animal in the world?

Cheetah sprints top out around 60 to 65 mph in short bursts; powerful hindlimbs, long legs and a flexible spine are all built for speed.

A newborn kangaroo is closest in size to which of these?

A jelly bean: the newborn is only a couple of centimetres long, yet it climbs unaided through its mother's fur into the pouch, where it stays for months.

What is a group of wolves called?

Pack usually just means family: a breeding pair and their offspring, and the old idea of an 'alpha wolf' fighting its way to the top came from studies of unrelated captive wolves.

Puck, who set the Guinness record for bird vocabulary with 1,728 words, was which small pet bird?

Budgerigar Puck, a pet owned by Camille Jordan in the United States, out-talked every big parrot on record; his estimated 1,728 words were logged before he died in 1994.

What is the largest species of bear?

Polar bear is the largest bear species and the biggest land carnivore, though Alaska's Kodiak brown bears can rival it; it is also the most carnivorous bear, living mainly on seals hunted from the sea ice.

Which of these animals has six legs?

Butterfly: like every insect it has six legs, though brush-footed butterflies keep the front pair so small and tucked up that they appear to stand on four.

Which ocean animal is known for having three hearts?

Octopus hearts share the work: two small ones push blood through the gills to pick up oxygen, and a third, larger heart then sends it around the rest of the body.

How does a flamingo hold its head to feed?

Upside down: a flamingo lowers its head until the bill is inverted, then pumps water in and out so that comb-like plates along the bill's edges strain out its food.

Which Australian marsupial is known for sleeping up to 20 hours a day?

Koalas sleep so much because eucalyptus leaves are tough, toxic and poor in energy; digesting them is slow, hard work that leaves little fuel for anything else.

What is the national bird of the United States?

Bald eagle has appeared on the Great Seal since 1782, yet it had no official title until an eagle enthusiast spotted the gap and Congress made it the national bird in December 2024.

Which reptile has the strongest bite force ever measured?

Saltwater crocodile jaws clamped down with about 3,700 pounds of force in a 2012 study, the hardest bite measured in any living animal; bite force climbs with body size, and this is the largest living reptile.

Which ecosystems cover a tiny fraction of the sea floor yet shelter about a quarter of all marine species?

Coral reefs are built by animals, not plants: colonies of tiny corals lay down hard limestone skeletons, and the crowd of life they shelter earns them the nickname 'rainforests of the sea'.

What is the largest living species of lizard?

Komodo dragon grows to about 3 metres; its lethal bite was long blamed on filthy, bacteria-laden saliva until researchers in 2009 showed it has venom glands in its lower jaw.

How do dolphins sleep without drowning?

They shut down half their brain at a time, so one hemisphere rests while the other keeps them surfacing to breathe and watching for predators.

Which species of shark must keep swimming to breathe?

Great white sharks are obligate ram ventilators: they must swim to force water over their gills, whereas bottom-dwellers such as nurse sharks can pump water with their cheek muscles and breathe lying still.

Which antelope makes up the bulk of East Africa's Great Migration, more than a million strong?

Wildebeest, well over a million of them, circle between Tanzania's Serengeti and Kenya's Masai Mara each year, following the rains that bring fresh grass, with gazelles travelling alongside.

Like most of the world's bee species, which of these bees nests alone instead of in a colony?

Mason bee females each build and stock their own nest, walling off the cells with mud, with no queen and no workers; most bee species live this way, and honey-making hives are the exception.

Rather than for camouflage, chameleons mostly change colour to do what?

Signal to one another: males flash brighter colours at rivals and mates and turn dark when they back down, and they also darken to soak up heat when they are cold.

In which country do all the world's wild bonobos live?

DR Congo, in full the Democratic Republic of the Congo, is the only country with wild bonobos; they live in forests south of the Congo River, which cuts them off from chimpanzees to the north.

Besides the platypus, which Australian mammal lays eggs?

Echidna mothers lay a single leathery egg into a pouch, and the hatchling, called a puggle, drinks milk that seeps from her skin because, like the platypus, she has no nipples.

Which sea turtle species is the largest?

Leatherback is the largest sea turtle, up to about two metres long, and a tireless traveller: some cross the whole Pacific from nesting beaches in Indonesia to feeding grounds off the US West Coast.

What adaptation allows owls to fly almost silently?

Specialized feather edges do it: comb-like serrations on the leading edge, a soft fringe on the trailing edge and a velvety surface that break up turbulence.

Which organization publishes the Red List of Threatened Species?

IUCN, the International Union for Conservation of Nature, sorts species into categories from Least Concern to Extinct, and governments, businesses and charities use those rankings to guide what gets protected.

What is the only mammal capable of true powered flight?

Bat wings are modified hands, with thin skin stretched between very long finger bones, so a bat can flap and truly fly while a flying squirrel can only glide.

What color is a polar bear's skin underneath its fur?

Black skin absorbs heat from the sun; the fur only looks white because its transparent hairs scatter visible light, much as snow does.

Which eagle was officially called the monkey-eating eagle until 1978?

Philippine eagle (Pithecophaga jefferyi) was renamed from monkey-eating eagle by a 1978 presidential proclamation; it is the Philippines' national bird and critically endangered, with a wingspan of about two metres.

The harmless scarlet kingsnake copies the red, yellow and black bands of which venomous species?

Coral snake bands are a warning that predators learn to avoid, so a harmless lookalike gets left alone too; this bluff with borrowed colours is called Batesian mimicry.

Roughly one in four known animal species belongs to which group of insects?

Beetles have front wings hardened into cases that shield the delicate flying wings folded beneath, which lets them push through soil, logs and leaf litter that would damage an unprotected wing.

Who narrated the BBC's 2006 series 'Planet Earth'?

David Attenborough narrated the British original, but many American viewers heard actress Sigourney Weaver instead, because she voiced the version shown on the Discovery Channel.

What word sums up the variety of life in an ecosystem?

Biodiversity is not spread evenly: it is richest in the tropics, where year-round warmth lets far more species live side by side, and thins out toward the poles.

Which ants are known for growing fungus gardens as their main food source?

Leafcutter ants carry leaf fragments home not to eat but to feed a fungus garden; the colony lives on the fungus it grows, a kind of farming far older than our own.

Which Arctic animal's long spiral tusk is actually an overgrown tooth?

Narwhal tusks are a single tooth that grows in a spiral straight through the male's upper lip, up to about 3 metres long, and may work as a sense organ as well as a signal to rivals and mates.

Salmon returning from the ocean find the very stream where they hatched mainly by which sense?

Smell guides the last leg: young salmon memorise the scent of their home stream before heading to sea and follow it back years later, after crossing the open ocean, it is thought, by magnetic compass.

What is a keystone species?

One with outsized impact relative to its numbers: ecologist Robert Paine coined the term in the 1960s after removing a single predator from a rocky shore and watching the mix of species there collapse.

Which 2001 BBC series was devoted entirely to the world's oceans?

The Blue Planet ranged from sunlit coasts down to the deep sea, and the same BBC team followed it five years later with a series on the whole globe, Planet Earth.

Monarch caterpillars feed only on which plant?

Milkweed is the only plant monarch caterpillars eat, and the heart poisons in its sap build up in their bodies, making them toxic to birds and other would-be predators.

Which Andean bear is Paddington, the stowaway from 'darkest Peru'?

Spectacled bear is the only bear on its continent; Michael Bond first had Paddington arrive from 'darkest Africa', until his agent pointed out that Africa has no bears, so he switched to Peru.

What is the term for the symbiotic relationship between clownfish and sea anemones?

Mutualism means both partners gain: the clownfish shelters among stinging tentacles that its mucus coat protects it from, and in return it drives off anemone-eating fish and keeps its host clean.

Which animal, extinct in the wild by 1927, was rebuilt from a few dozen zoo survivors?

European bison vanished from the wild when the last one was shot in the Caucasus in 1927; every animal alive descends from just 12 zoo founders, and by 2019 more than 6,000 were roaming free again.

Which primate is the only one with a toxic bite?

Slow loris is the only venomous primate: it licks a secretion from a brachial gland on its upper arm, mixes it with saliva, and bites, mostly in fights with other lorises.

Which predator was returned to Yellowstone in 1995, setting off a much-studied chain reaction among elk, willows and beavers?

Gray wolf numbers in Yellowstone had been zero since the 1920s; once they returned, elk browsed differently, willows recovered in places and beaver colonies multiplied, a cascade researchers are still untangling.

Which marine animal can regenerate its entire body from a single arm?

Starfish of a few species can regrow a whole body from one severed arm, a lopsided stage known as a comet; most others can replace lost arms but need part of the central disc to survive.

What is the term for the glow that fireflies make?

Bioluminescence in a firefly comes from the enzyme luciferase acting on a compound called luciferin with oxygen; almost none of the energy is lost as heat, which is why it is called cold light.

Which animal was down to its last two individuals, a mother and daughter, as of 2023?

Northern white rhino numbers fell to two females, Najin and her daughter Fatu, kept under armed guard in Kenya, after the last male, Sudan, died in 2018; scientists have since made embryos from frozen sperm.

What unique hunting strategy does the pistol shrimp use?

Snapping its claw to fire a stunning bubble works because the bubble collapses with a loud crack, a flash of light and, for an instant, temperatures of several thousand degrees, enough to stun or kill small prey.

What term describes animals that regulate body temperature internally, via metabolism?

Endothermic animals such as birds and mammals make their own heat, which keeps them active in the cold but at a price: much of what they eat is burned just to stay warm.

Which is the largest fish in the sea?

Whale shark is a gentle giant: it cruises with its huge mouth open, straining plankton and small fish from the water, and despite its size it is docile and no threat to swimmers.

Which bird of prey is usually called the fastest animal on Earth thanks to its dive?

Peregrine falcon hunts other birds from above: after spotting one it drops into a steep dive, or stoop, that can top 320 km/h (200 mph) and strikes its prey in mid-air.

What is the largest animal known to have ever existed?

Blue whale grows to about 30 metres, yet it feeds almost entirely on tiny krill, straining tonnes of them a day through the baleen plates that hang in its mouth.

Which bird has the longest wingspan of any living species?

Wandering albatross wings can span well over 3 metres, and it rides the ocean winds on them for hours without a single flap, covering vast distances over the Southern Ocean.

The wild axolotl's last natural habitat is the canals of which Mexican lake?

Xochimilco, a remnant web of canals in southern Mexico City, is the wild axolotl's last refuge; pollution and introduced fish such as tilapia have all but wiped it out there, even as it breeds readily in captivity.

Which animal became the world’s largest carnivorous marsupial when the thylacine died out?

Tasmanian devil inherited the title when the thylacine died out, but since the 1990s a rare contagious cancer that grows around the face and mouth has killed tens of thousands of them.

Where does a male platypus keep its venom-delivering spur?

On each hind foot: males carry a sharp spur on each ankle fed by a venom gland that is most active in the breeding season, a sign it is probably a weapon against rival males; females lose their spurs young.

Which chicken-sized bird lays one of the largest eggs, relative to its body, of any bird?

Kiwi chicks hatch fully feathered, like miniature adults, and are never fed by their parents; each lives for its first days on the rich yolk left over from that enormous egg.

Despite its striped legs, the okapi is most closely related to which animal?

Giraffe and okapi are the only living members of their family, and they share a long, dark tongue; the okapi's is long enough to wash its own eyes and ears.

Which Madagascar lemur taps on wood and hooks out grubs with a long, thin middle finger?

Aye-aye taps along branches and listens with its huge ears for grub tunnels under the bark; in parts of Madagascar it is feared as an evil omen and killed on sight.

Which scaly animal is described as the most trafficked mammal in the world?

Pangolin is called the world's most trafficked mammal, poached for its meat and for scales prized in traditional medicine, though they are plain keratin like our fingernails; when threatened it rolls into an armoured ball.

The vaquita, a small porpoise on the brink of extinction, lives only in which body of water?

Gulf of California, in its upper reaches off Mexico, is the vaquita's only home; its decline is driven by gillnets set illegally for totoaba, whose swim bladders fetch high prices on the black market.

Which New Zealand bird is the world's only flightless parrot?

Kākāpō is the only flightless parrot and the heaviest; having evolved with no land mammals to flee, it grew heavy and gave up flight, and at night males boom from dug-out bowls to call in mates.

Turritopsis dohrnii, nicknamed 'immortal' because it can revert to a juvenile stage, is what kind of animal?

Jellyfish Turritopsis dohrnii, when starved or injured, can shrink into a blob that settles on the seabed as a polyp, the stage it grew from, then buds off new jellyfish and starts again.

Which species is the smallest bird in the world?

Bee hummingbird, endemic to Cuba, is the smallest bird: males weigh under 2 grams and measure about 5.5 cm, which also makes it the smallest known living dinosaur.

In emperor penguins, who keeps the egg warm through the Antarctic winter?

The male alone balances the egg on his feet under a fold of skin for about two months, eating nothing through the Antarctic winter, while the female walks back to the sea to feed.

Which rodent lives in insect-like colonies ruled by a single breeding queen?

Naked mole-rat colonies have one breeding queen while the rest dig, forage and guard the tunnels; when she dies, several females fight, sometimes to the death, to take her place.

Which Australian songbird's male fills most of his courtship song with imitations of other birds?

Superb lyrebird males sing and dance on mounds of bare earth they clear in the forest, throwing the long tail forward over the head while weaving in copies of other birds' calls.

Which shark is the longest-lived vertebrate known, with one female aged at roughly 400 years?

Greenland shark: radiocarbon dating of proteins in the eye lens put the largest female studied at about 392 years, give or take 120, and the species may not breed until it is around 150.

Which Arctic cetacean is considered the longest-lived mammal, passing 200 years?

Bowhead whale: a specimen caught off Alaska in 2007 carried the head of a bomb lance made between 1879 and 1885, and eye-lens dating has put some bowheads past 200 years.

Which bird has the largest eyes of any land vertebrate, about 50 mm across?

Common ostrich eyes are almost 5 cm across; carried on a neck that lifts them well over two metres above the plain, they let the bird spot approaching predators from a great distance.

Why is a horseshoe crab's blood blue?

Copper-based hemocyanin carries oxygen in horseshoe crab blood and turns blue when oxygenated; the blood is harvested for Limulus amebocyte lysate, a test for bacterial endotoxins in medicines and implants.

What is the largest living land animal?

African bush elephant bulls weigh around 5 to 6 tonnes, and their enormous ears do more than hear: they shed body heat and help keep the animal cool in the African sun.

Which is the largest cat species native to the Americas?

Jaguar jaws are strong enough to pierce turtle shells, and it often kills mammals with a single bite straight through the skull rather than going for the throat.

Which species is the northernmost-living non-human primate?

Japanese macaque troops live as far north as Honshu's Shimokita Peninsula, snowbound for months each year, and one troop in central Japan warms up by soaking in hot springs.

Wild orangutans are found only on which two islands?

Borneo and Sumatra hold every wild orangutan, and logging and the spread of farmland, palm-oil plantations above all, have cleared so much of their forest that every species is at serious risk of extinction.

The last known thylacine died in 1936 at a zoo in which Australian city?

Hobart's zoo held the last known thylacine, which died in 1936; its remains then went missing for 85 years before turning up in a cupboard at the city's museum in 2022.

Martha, who died at Cincinnati Zoo in 1914, was the last known member of which species?

Passenger pigeon flocks once numbered in the billions, yet hunting crashed them within decades, and Martha, about 29 years old and alone, died on 1 September 1914.

The quagga, striped only on its front half and extinct since 1883, was a subspecies of which animal?

Zebra DNA settled it: tests on old museum skins showed the quagga was a variety of plains zebra, not a separate species, and a breeding project begun in 1987 is trying to recreate its coat.

Which Galápagos reptile appears in Darwin's Beagle diary as 'imps of darkness'?

Marine iguana, the only lizard that feeds at sea, repelled Darwin; when El Niño kills off the algae it grazes, it can shrink its own skeleton by up to a fifth and grow back later.

Off which country was the first living coelacanth found in 1938?

South Africa: museum curator Marjorie Courtenay-Latimer spotted the strange fish in a trawler's catch in 1938, tens of millions of years after its kind was thought to have died out with the dinosaurs.

Which animal is the fastest land mammal in the Western Hemisphere?

Pronghorn can sprint at more than 85 km/h and, unlike most sprinters, keep up a fast pace for kilometres thanks to an oversized heart and lungs, leaving coyotes and bobcats far behind.

The electric eel lives in the rivers of which region?

South America's northern rivers, the Amazon and Orinoco among them, are home to every electric eel; despite the name they are knifefish, not true eels, and the 860-volt record belongs to a species named only in 2019.

Which snake is the heaviest in the world?

Green anaconda is the heaviest snake: the reticulated python can grow a little longer, but the anaconda's sheer girth makes it almost twice as heavy, a bulk it carries by spending most of its life in water.

Which spider is the largest in the world by mass?

Goliath birdeater weighs up to about 170 grams, with legs spanning nearly 30 cm; despite the name it rarely eats birds, living mostly on insects, worms and frogs.

How does the archerfish knock insects off overhanging leaves?

Spitting jets of water: an archerfish aims from just below the surface, allowing for the way light bends where water meets air, and knocks insects off leaves well above its head.

What is the largest living rodent?

Capybara can weigh 65 kg and spends so much time in water that, by tradition, the Catholic Church allowed it to be eaten during Lent, when other meat is off the table.

Which marine mammal has the densest fur in the animal kingdom?

Sea otter fur has up to about a million hairs per square inch; lacking the blubber of other marine mammals, it depends on that coat for warmth, which is also why fur hunters had nearly wiped it out by 1911.

Which species is the largest living marsupial?

Red kangaroo males can reach about 90 kg, and a mother can put a new embryo on hold until the young already in her pouch has moved out.

The golden poison frog, arguably the most poisonous animal alive, is native to which country?

Colombia's Pacific rainforest is the frog's only home; Emberá hunters tip blowgun darts by wiping them across its back, and the poison is thought to come from the insects it eats.

Which land mammals are the closest living relatives of manatees and dugongs?

Elephants, together with hyraxes, are the sirenians' closest living relatives in the group Paenungulata; sirenians evolved from four-legged land mammals around 50 million years ago.

Which reptile is the last survivor of an order that flourished alongside the dinosaurs?

Tuatara, found only in New Zealand, looks like a lizard, but its order's other members died out about 60 million years ago; one captive male, Henry, became a father at the age of 111.

Which waterfowl is famous for migrating over the Himalayas at extreme altitude?

Bar-headed goose has been tracked above 7,000 metres on the crossing; its blood binds oxygen unusually well, and it flaps the whole way, hugging the terrain rather than soaring.

Which narrow-snouted Indian crocodilian is nicknamed the fish-eating crocodile?

Gharial males grow a bulbous knob on the snout tip, called a ghara after the Indian clay pot it resembles; it works as a resonator, turning their calls into a loud buzz that helps attract mates.

Which big-eared North African desert dweller is the smallest fox species?

Fennec fox weighs little more than a kilogram, and its outsized ears do two jobs: shedding desert heat and picking up the faint sounds of prey moving underground.

The bamboo-eating giant panda has the gut of what kind of animal?

Meat-eater: the panda is a bear with a carnivore's digestive system, so much of the bamboo it swallows passes through as waste and it has to eat enormous amounts to get by.

Przewalski's horse has been reintroduced to the wild since the 1990s in which country?

Mongolia began taking back zoo-bred herds in the 1990s; every Przewalski's horse alive descends from fewer than 15 wild-caught animals, yet the species has gone from extinct in the wild to free-roaming again.

Which is the smallest of the five living rhino species?

Sumatran rhinoceros is the smallest rhino and the only one with a shaggy coat of reddish hair, which earns it the name hairy rhinoceros; wild animals are usually so caked in mud that the hair hardly shows.

Which long-legged African raptor hunts on foot and kills prey by stomping on it?

Secretarybird kills by stamping on its prey with those long legs; though famed as a snake killer, it eats snakes less often than legend suggests, living mainly on insects and other small animals.

Which vulture hit an airliner at 11,300 metres in 1973, the highest confirmed bird flight?

Rüppell's vulture: the record comes from a bird sucked into a jet engine over Ivory Coast in November 1973; an unusual form of haemoglobin lets the species take up oxygen in very thin air.