The environment where owls stay should be calm and quiet as they are birds with acute hearing. Voices and noises can affect their health and behavior. For most owl species, it is also important to provide them with places to hide during the day because they are nocturnal animals.The largest owl found in Poland is the eagle owl (comparable to eagles - maybe that's why its English name is Eagle Owl) and the smallest is the pygmy owl (the size of a sparrow).