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The weasel is a small carnivorous animal that can be found on every continent except Australia and its nearby islands, as well as the harsher polar regions.

Weasel Scientific Classification

Kingdom: Animalia

Phylum: Chordata

Class: Mammalia

Order: Carnivora

Family: Mustelidae

Genus: Mustela

Scientific Name: Mustela nivalis

Weasel Conservation Status: Least Concern

Weasel Locations: Asia, Eurasia, Europe, North-America

Weasel Facts

Prey: Mice, Lemmings, Voles

Name Of Young: Kitten

Group Behavior: Solitary

Fun Fact: The smallest carnivorous mammal in the world!

Estimated Population Size: Stable

Biggest Threat: Lack of prey species

Most Distinctive Feature: Brown back and head with white underside

Other Name(s): Common Weasel, European Weasel, Least Weasel

Gestation Period: 5 weeks

Habitat: Forest and open woodland

Predators: Hawks, Foxes, Snakes

Diet: Carnivore

Average Litter Size: 5

Lifestyle: Diurnal/Nocturnal

Common Name: Weasel

Number Of Species: 10

Location: Northern Hemisphere

Slogan: The smallest carnivorous mammal in the world!

Group: Mammal

Weasel Physical Characteristics

Colour: Black, White, Tan

Skin Type: Fur

Top Speed:15 mph

Lifespan: 1 – 3 years

Weight: 120g-198g (4.2oz – 7oz)

Length: 22cm – 38cm (8.6in – 15in)

Age of Sexual Maturity: 1 – 2 years

Age of Weaning: 8 weeks

Weasel Classification and Evolution

The weasel is a small carnivorous animal that can be found on every continent except Australia and its nearby islands, as well as the harsher polar regions. There are a variety of Weasel species that differ in scale, color, and behavior based on where they live in the world. The most common is the Common Weasel (also known as the European Weasel or the Least Weasel), which can be found in much of the northern hemisphere.

These little yet deadly predators are the world’s tiniest carnivorous animals, measuring no more than 6 inches in length from nose to tail. Weasels are carnivores that belong to the mustelid tribe. They are most closely related to animals like stoats, which are taller and have a black tip at the end of their brown tail. Weasels are fairly common animals in much of their natural range, but habitat destruction has harmed habitats in some regions, and they are often regarded as pests by farmers.

Weasel Anatomy and Appearance

Since their long, lean bodies are ideal for following mice into their burrows, the weasel has adapted to feed on small animals like no other carnivore. Weasels have thin, narrow heads that aren’t much wider than their necks, which, along with their short legs and flexible spines, allows them to get around in small, cramped spaces with ease. The Weasel has a triangular head with a distinctly pointing snout, short rounded ears, and black eyes.

Their coat is dark or light brown on the top, back, legs, and tail, and white on the underside, and they molt twice a year, once in April from the darker winter coat to the flatter, lighter one, and again in August or September from the summer coat to the winter coat. This not only guarantees that the Weasel is as warm as possible by November, but it also means that individuals in northern areas will sometimes change color from brown to white to blend in with the snow.

Weasel Distribution and Habitat

Weasels are native to North America, Europe, Asia, and northern Africa, where they can be found in a number of environments including woodlands, coniferous forests, and grassy plains. Weasels, like their larger relative the Stoat, have been introduced to countries such as New Zealand and a host of other islands (primarily as a means of pest control). Weasels, like the introduction of a variety of small predators to such remote locations, have had a significant impact on natural biodiversity, which has evolved in the same manner for millions of years without the threat of small terrestrial carnivores. Weasels are opportunistic predators that can be found in more urban areas, particularly near farms, where there is a plentiful supply of food. Weasels are endangered by habitat destruction in areas of their natural range, including their adaptability.

Weasel Behaviour and Lifestyle.

The weasel is a solitary species that spends most of its time on the ground during the day and night searching for small mammals. Weasels are aggressive animals that patrol home ranges that differ in size based on environment and food supply. While male and female home ranges are known to overlap, the two rarely interact except when mating. Weasels are known to build dens in crevices, tree roots, and unused burrows that are lined with grass and fur and provide a protected haven for the Weasel to rest. Weasels are extremely strong and aggressive for their size, and can capture and kill creatures several times their own size before returning to their burrow. Weasels are known to sit up on their hind legs, exposing their white underside, to ensure that they have the greatest view of their surroundings.

Weasel Reproduction and Life Cycles

Only when a male and female meet to mate will Weasels accept each other. The female Weasel gives birth to a litter of one to seven kittens in her burrow after a gestation period of about five weeks. Young Weasels grow rapidly, and by the time they are two months old, they are not only weaned but already capable of hunting small prey. They will abandon their mother within the next few weeks to establish their own territories. While female Weasels live for three years on average, they do not have the ability to breed until their second and third years. Males, on the other hand, seldom live to see their first birthday and their proclivity to wander more in search of a mate makes them more vulnerable to a variety of predators.

Weasel Diet and Prey

The Weasel is a trained and ferocious hunter who can directly penetrate the burrows of its prey, something that other predators cannot do. The Weasel is able to trace small animals back to their burrow by following their tunnels through the undergrowth and sometimes under the snow, and then catching them inside. Mice and voles, as well as Lemmings further north, make up the majority of the Weasel’s diet, with the occasional bird thrown in for good measure.

They have also been known to consume eggs and to be capable of killing bigger species such as ducks and rabbits. While the Weasel’s long body is ideal for getting into small burrows, it covers a wide surface area and therefore loses a lot of body heat. Weasels must feed about a third of their body weight every day to ensure that they have enough resources to survive, which is why they are such successful hunters.

Weasel Predators and Threats

Weasels, despite their speed and dexterity, are preyed upon by a variety of predators in their natural range due to their limited size. Predators of the weasel include birds of prey such as owls, hawks, and eagles, who can see them from great heights, as well as foxes and snakes. Domestic cats and dogs prey on weasels in regions where they live near human settlements. However, because of their opportunistic disposition, they are regarded as pests by farmers and are often prosecuted for stealing animals, mostly poultry and eggs.  Weasels are endangered by habitat destruction in some parts of the world, and a lack of their target species may have catastrophic consequences for local ecosystems.

Weasel Interesting Facts and Features

The weasel is a carnivorous creature with long, pointed canine teeth for biting and shearing flesh. Despite their small size, their teeth are razor-sharp and capable of killing predators more than twice their size. Each of the five toes on a weasel’s paws is tipped with a thin, non-retractable claw. While their claws are mainly used for grasping prey, they also assist Weasels in burrowing into the earth rapidly. Males and females have identical coat colors and markings, but males are somewhat larger, with a body length a quarter longer and weight about twice that of females.

Weasel Relationship with Humans

The Weasel’s vicious and greedy nature has earned them a bad reputation among farmers, particularly those who trap and destroy them to avoid more livestock losses. They have, however, been introduced to countries where they are not naturally found as a means of natural pest control due to their versatile and dominant nature. Weasels, like a host of other native British animals, also feature as characters in books and in children’s songs.

Weasel Conservation Status and Life Today

The IUCN has classified the weasel as a species with a low risk of becoming extinct in its natural habitat in the near future. They are widespread but uncommon in North America, but they are common in Europe and Asia, and introduced populations in other countries are also stable. Any isolated communities, on the other hand, are becoming more vulnerable.

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