Sheep have an exceptional memory: They can remember faces of fellow sheep and humans for up to two years.
Sheep can remember the faces up to 50 other sheep.When you think of sheep, you will usually have an animal with white, curly fur in mind. But there are always black sheep that of course particularly stand out in a white herd. Their wool cannot be dyed as well as the wool of white sheep. That is where the proverbial "black sheep" comes from as a term for an outsider. But otherwise, black sheep do not differ from the white. They are just as intelligent, playful, and sociable and have a very good memory.