Ermine

The ermine, also called the stoat, is a small carnivorous mammal found across the cold and temperate regions of Europe, Asia and North America. It has a long, slender body, short legs and a tail ending in a distinctive black tip that remains black throughout the year. During summer, its coat is reddish-brown on the back and white underneath.

In many northern populations, the fur turns almost completely white in winter, providing effective camouflage against snow while the black tail tip stays visible. This seasonal color change is triggered mainly by daylight rather than temperature, although climate influences its timing. Ermines are active hunters that rely on speed, agility and sharp senses to catch prey much larger than their own size.

Their diet consists mainly of small mammals, especially voles and mice, but they also eat rabbits, birds, eggs and occasionally insects. Despite its small size, the ermine is a bold and efficient predator. It often follows rodents into their burrows thanks to its narrow body, allowing it to hunt where larger predators cannot reach. Most individuals live alone and defend territories marked with scent.

The breeding season takes place in spring or early summer, but the fertilized egg does not begin developing immediately. Instead, it remains dormant for several months in a process called delayed implantation, so the young are born the following spring when food is more abundant. Although the species is still widespread, changing snow conditions caused by a warming climate may reduce the effectiveness of its white winter coat in some regions, making it more visible to predators.