Οlympus’ fauna, that has not been systematically studied so far, includes considerable variety and is marked by important, rare and endangered species. Large mammals, that lived formerly in the region, like deer, have disappeared. In ancient times there were lions (Pausanias), while at least until the 16th century there were bears (Life of St. Dionysios the Later).
There have been recorded 32 species of mammals, including wild goat (Rυρicapra rupicapra balcanica), roe deer (Capreolus capreolus), wild boar (Sus scrofa), wildcat (Felis sylvestris), beech marten (Martes foina), red fox (Vulpes vulpes) and red squirrel (Sciurus vulgaris). There have also been detected 108 species of birds (like sparrowhawk, cinereous vulture, rock partridge, white stork, rock dove, European robin, lanner falcon, peregrine falcon, tree falcon, golden eagle, short-toed snake eagle, booted eagle and hoopoe). Many of them, particularly the birds of prey, are scarce. In addition there are the common reptiles of Greek fauna (22 species like snakes, turtles, lizards, etc.) and some amphibians (8 species) in streams and seasonal ponds, as well as a great variety of insects, particularly butterflies.
Olympus - The mountain of Gods 