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Weasel

life science Maturity 11-13 Next article →

Weasels are small, active predators belonging to the genus Mustela.

Mustela nivalis -British Wildlife Centre-4
Mustela nivalis -British Wildlife Centre-4

This group includes many animals like ferrets, stoats, and polecats. They are part of a larger family called Mustelidae. This family also includes badgers, otters, and wolverines. In Great Britain, people usually use the name "weasel" for the least weasel. This specific animal is the smallest carnivoran species in the world.

Mustela erminea upright2
Mustela erminea upright2

Their bodies are long and slender with very short legs. This special shape helps them follow prey deep into small burrows.

These animals hunt by following their food into underground tunnels.

Yellow bellied weasel, Shillong, India
Yellow bellied weasel, Shillong, India

Weasels eat many small mammals, especially rodents. Because some species take rabbits or poultry from farms, people sometimes call them vermin. Their fur colors can change depending on the season. Most have red or brown fur on top and white bellies. Some populations undergo a moult to grow a completely white coat in winter.

Mustela erminea upright2
Mustela erminea upright2

This helps them stay hidden in the snow. Their tails can also vary in length.

Scientists use specific names to group these animals together.

Ferret 2008
Ferret 2008

The name Mustela comes from two Latin words. The word "mus" means mouse. The word "telum" means javelin. Together, they describe a mouse-like animal that is long like a javelin. In 1999, researchers changed how they group some animals. They moved the American mink and sea mink to a new group called Neovison. Later, in 2021, more species like the long-tailed weasel moved to the genus Neogale. This happened because these species were found to be distinct.

Weasels live in many different parts of the world.

Mustela itatsi on tree
Mustela itatsi on tree

You can find them across Europe and North America. They also live in much of Asia and small parts of North Africa. There are 16 different species currently in the genus Mustela. Ten of these species have the word "weasel" in their common names. Other members include the European mink and the ferret.

Ferret 2008
Ferret 2008

Some species, like the Haida ermine, live in very specific places like Haida Gwaii.

Many cultures have interesting stories about weasels.

In Japan, they are often seen as yōkai, which are spirits or monsters. Some legends say they can shapeshift like foxes. In Greece, a weasel near a house was sometimes seen as a sign of bad luck. However, in Macedonia, they are seen as an omen of good fortune. In English, the word "weasel" can even be an insult. It describes someone who is sneaky or untrustworthy. People also use the term "weasel words" for speech that is misleading.

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🖼️ Images & Media (16)
File:Mountain Weasel (Mustela altaica).jpg
Mountain Weasel (Mustela altaica).jpg
File:Mustela erminea upright2.jpg
Mustela erminea upright2.jpg
File:Haida Ermine (Mustela haidarum).jpg
Haida Ermine (Mustela haidarum).jpg
File:Yellow bellied weasel, Shillong, India.jpg
Yellow bellied weasel, Shillong, India.jpg
File:Mustela_nivalis_-British_Wildlife_Centre-4.jpg
Mustela_nivalis_-British_Wildlife_Centre-4.jpg
File:Ermine- Bacon Fiend (14083889879).jpg
Ermine- Bacon Fiend (14083889879).jpg
File:Mustela itatsi on tree.JPG
Mustela itatsi on tree.JPG
File:Mink1.jpg
Mink1.jpg
File:Siberian Weasel Pangolakha Wildlife Sanctuary East Sikkim India 14.05.2016.jpg
Siberian Weasel Pangolakha Wildlife...
File:Mustela strigidorsa.gif
Mustela strigidorsa.gif
File:Wild steppe polecat.jpg
Wild steppe polecat.jpg
File:Ferret 2008.png
Ferret 2008.png

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