The basin of Lake Trasimeno is one of the most important ecosystems in the region. The extensive reed beds and open waters are extremely complex an environment, the rich vegetation and rare species of birds, the heron from the great crested grebe, make this area a wetland complex of exceptional value and international interest. A guided tour to the oasis "The Valley" near S. Savino will make it very interesting in this sense the discovery of the particular bird in the park.