40 Fun Facts About Stoats

Which part of a stoat stays black even when its coat turns white for winter?

The tip of its tail stays black even on an all-white stoat, and weasels lack it. The dark tuft is thought to act as a decoy, drawing a bird of prey's strike away from the body.

Stoats were shipped to New Zealand in the late 1800s to control which pest of sheep pasture?

Rabbits had become a plague on sheep farms, so farmers demanded stoats despite warnings from bird experts. Within six years of the first releases, native birds were in drastic decline.

A weasel's head can fit through which piece of jewellery, a test the larger stoat's head fails?

A wedding ring is wide enough for a weasel's head but too tight for a stoat's. Weasels also have a wavy line where the brown back meets the pale belly, while a stoat's line is neat.

Which Renaissance artist painted Lady with an Ermine, a portrait of Cecilia Gallerani holding a white stoat?

Leonardo da Vinci painted it around 1490, though the animal is thought too large to be a real ermine. The picture hangs in Kraków and is counted among Poland's national treasures.

Why is a hunting stoat said to leap, twist and thrash about in a frenzied 'dance' near its victim?

To mesmerise it is the traditional answer: the leaping and thrashing seems to hypnotise its prey. Another theory blames the antics on a parasite infection.

Stoats cause about half the chick deaths of which flightless New Zealand bird?

Kiwi chicks stay vulnerable to stoats until they weigh about a kilogram and can defend themselves. Without protection, only 5 to 10 percent of them survive to adulthood.

Tina and Milo, two cartoon stoats, were the mascots of the 2026 Winter Olympics and Paralympics in which country?

Italy's schoolchildren designed the pair, named after the host cities Cortina d'Ampezzo and Milan. Tina has a white coat and her brother Milo a brown one, echoing the stoat's seasonal change.

How do stoats usually invade New Zealand's island bird sanctuaries, as one did at Chalky Island in 2022?

By swimming, which stoats do well: in a tank test one paddled against a current for two hours without stopping. Catching the Chalky Island stoat took eight months and about NZ$300,000.

A European legend said a white stoat would rather die than dirty its coat, making ermine a symbol of what?

Purity became the ermine's meaning because it was said to give itself up to hunters rather than soil its fur. The English writer Henry Peacham urged readers to keep their consciences just as clean.

In The Wind in the Willows, stoats, weasels and ferrets from the Wild Wood seize whose grand riverside home?

Mr Toad loses Toad Hall to the Wild Wooders while he is away in prison. He and his friends retake it by creeping in through a tunnel and pouncing during a celebration party.

The stoat belongs to the mustelids, a family of long-bodied meat-eaters that also includes which animal?

Otter species share the stoat's family with badgers, martens, polecats and wolverines. With 66 to 70 species, it is the largest family in its branch of the carnivores.

In His Dark Materials, whose shape-shifting dæmon Pantalaimon counts a snow-white ermine among his favourite forms?

Lyra Belacqua's dæmon also likes to be a moth, a wildcat or a mouse. When she grows up he settles for good as a relative of the stoat, a red-gold pine marten.

New Zealand's Predator Free 2050 plan aims to wipe out stoats, rats and which introduced Australian marsupial?

Possums joined rats and stoats as the plan's first targets. Feral cats were added to the list in November 2025, having been left off earlier because cat owners objected.

Which English queen is painted with a white ermine wearing a gold collar in the 'Ermine Portrait' of 1585?

Elizabeth I shares the picture with an ermine whose gold collar is studded with topazes. She also holds an olive branch for peace, with a sword of justice on the table at her side.

Which religious leader's red velvet winter cape, the mozzetta, is traditionally trimmed with white stoat fur?

The Pope has five versions of the short shoulder cape, and the winter one is red velvet edged with ermine. It is worn from late November until Ascension Day.

Stoat kits are born blind, deaf and toothless; who feeds and protects them until they are independent?

The mother alone raises the kits, and the male plays no part at all. They start on solid food at four weeks and open their eyes a week or two after that.

A male stoat may be called a dog, hob or jack, but what is the traditional name for a female?

Jill is the female, a neat match for the male's name jack. The young are called kits, and a group of stoats is known as a gang or a pack.

What does a stoat usually do with the extra animals it kills when prey is easy to catch?

Stores them for later: a stoat kills more than it needs when it can and hides the surplus. It gets through about 50 g of food a day, a quarter of its own body weight.

Wooden tunnel traps set for stoats in New Zealand are often baited with which everyday food?

An egg is the usual lure, placed in a wooden box with a small entrance and a trap inside. Stoats are hard to control because they are wary of both traps and bait.

Where does a hunting stoat aim the bite that kills mice and voles almost instantly?

Back of the neck is the target, and small victims die at once. The stoat grips with its teeth and wraps its body and feet around the animal as it bites.

Because of the damage it does abroad, the stoat appears on a global list of the 100 worst what?

Invasive species on the list, first compiled in 2000, were picked for their serious impact on wildlife or people. The stoat earned its place through its toll on New Zealand's native birds.

What signal triggers a stoat's autumn moult, which brings in the white winter coat known as ermine?

Shorter days set off the moult, which begins earlier in autumn the further north a stoat lives. In the mild south of its range the winter coat simply grows in brown, only thicker.

Stoats mate in summer but give birth the following spring; which reproductive trick puts the pregnancy on hold?

Delayed implantation keeps the fertilised cells dormant for nine or ten months, so a pregnancy lasts about 300 days in all. The active part of it takes only around four weeks.

Thanks to visiting adult males, most female stoats are already pregnant by which early point in life?

Before they are weaned, at just a few weeks old, female kits are mated in the nest. The pregnancy then pauses, so they give birth the following spring as full-grown adults.

Which long-legged wading bird, not a bird of prey at all, is known to catch and eat stoats?

Grey herons catch fish and amphibians in shallow water, but they also take small mammals such as water voles, rats and stoats. Foxes, eagles, buzzards and goshawks hunt stoats too.

Stoats live on most northern islands in their range, but which of these large islands has none?

Iceland has no stoats, and neither do Svalbard or the Mediterranean islands. Ireland, by contrast, has had them since before the first people arrived.

In Irish folklore, how could a traveller avert the bad luck of meeting a stoat?

Greet it as a neighbour, the advice went, and the bad luck was cancelled. Stoats were imagined living in families much like people, even holding rituals for their dead.

According to Irish folklore, what did a stoat carry that was powerful enough to poison a grown man?

Its saliva was the feared weapon, and the animals were also branded habitual thieves. Stoats were even said to hold the souls of infants who died before baptism.

In New Zealand, stoat numbers explode after 'mast' years, when which forest trees drop a huge crop of seed?

Beech forests can drop trillions of seeds in a mast, feeding a boom in rats and mice that stoats then breed on. When the rodents run short, the extra stoats turn on native birds.

In heraldry, ermine is a white field strewn with black shapes; which French region's flag still carries them?

Brittany took ermine as the arms of its medieval dukes, and its modern striped flag keeps a corner of ermine spots. Flags made since the 1970s nearly always show exactly eleven of them.

British peers wear capes dotted with stoat fur at a coronation; what do the rows of ermine spots show?

The wearer's rank is counted in rows: four for a duke, three for an earl and two for a baron. A marquess and a viscount each get an extra half row.

A famed statue of the infant Jesus, dressed in an ermine cloak after Easter, stands in which capital city?

Prague's Church of Our Lady of Victories holds the 16th-century statue, which came from Spain. Nuns dress it in rich robes, and the ermine cloak marks the anniversary of its crowning in 1655.

Stoat pelts were long a staple of which country's fur trade, the source of the highest grades of ermine?

Russia traded in stoat pelts until the 20th century, and at times at least half the world's catch came from Soviet lands. Trappers rarely used guns, which could damage the fur.

A stoat's teeth are too short to deliver a killing wound to large animals, so what usually finishes its biggest prey?

Shock is the usual cause of death, because the stoat's canines cannot reach any vital spot on a big victim. Stoats will still tackle prey more than five times their own size.

In a severe winter, a pregnant female stoat's body can respond in which drastic way?

Reabsorb her whole litter: the female's body simply takes the unborn young back in. Otherwise adult female stoats spend almost their entire lives either pregnant or in heat.

Stoats tend to get smaller the further north they live, defying which principle named after a German biologist?

Bergmann's rule, named after the biologist Carl Bergmann, says animals run larger in colder places. Stoats do the opposite, which is unusual among the carnivores.

Fossil stoat bones have been found in which Altai Mountains cave, famous for an extinct human group named after it?

Denisova gave its name to the Denisovans, first identified in 2010 from a finger bone dug up there. Bones of cave lions and cave hyenas have been found in the cave too.

Stoats and North America's long-tailed weasels stayed apart until falling seas exposed which Ice Age crossing?

Bering land bridge crossings about 500,000 years ago brought the two together. The stoat had arisen in Eurasia and its cousin in North America, as mirror images of each other.

Stoats ended an 1890s bid to save flightless birds at which New Zealand refuge, where Richard Henry was caretaker?

Resolution Island was made a reserve in 1891, and Henry spent 14 years moving kākāpō and other threatened birds there. Stoats reached it around 1900 and his kākāpō did not survive.

One old theory traces the word 'ermine' to which country, where the stoat was once thought to originate?

Armenia is the source in this theory, by way of a Latin phrase meaning 'Armenian mouse'. Other scholars instead trace the word to an old Germanic name for the animal.