The Stoat is a similar colour to the Weasel for most of the year, but in the north in the winter its coat turns white for camouflage in the snow.
The white fur with the black-tipped tail is known as "ermine".
As the old saying goes: "How do you tell the difference between a weasel and a stoat?"
"A weasel's weasily recognised; a stoat is stoatally different".
In fact a stoat is much larger -- 35-40 cm long including the 10 cm tail. The tail is 2-3 times as long and always has a black tip.
The Stoat's main prey is rabbits, which are significantly larger than a Stoat. It climbs and swims well and
also eats birds and rodents.
The male Stoat performs a fast and agile dance, jumping and running in circles.
An adult male Stoat (often the father) will impregnate female young so that they are pregnant when they leave the nest.