Why do some animals change their colour of coat during spring?

Many animals, such as hares, weasels, stoats, and Arctic foxes, change the colour of their coats during spring to camouflage themselves in their changing environment. During winter, they have a white coat that blends in with the snowy landscape, providing protection from predators. As spring arrives and the snow melts, they shed their white fur and grow a new coat with colours and patterns that better camouflage them against the emerging greenery, leaves, and flowers of the spring season. By adapting their coat colour to match their surroundings, these animals increase their chances of survival by being less visible to predators. This colour change is triggered by changes in day length and is controlled by hormones that regulate fur growth and pigmentation.