It's probably happened to you. You're in the forest, far away, and you see a slight movement. But the animal is too far away. You know it has four legs, a brown body, and maybe even antlers... But what is it? Is it a deer? Maybe a roe deer? A fallow deer, perhaps?... No idea. You might even have your binoculars handy... but... you're not entirely sure... Deer, roe deer and fallow deer...But which one is each?
