Every year is repeated a natural phenomenon, linked to the reproduction of one of the largest mammals: deer. Adult males in this season, they emit a dull sound ( belling ) by exploiting their strong lung capacity.
These noise in the favorable season, are repeated continuously as each male is stimulated by others to communicate his position and rank. The result is a concert of sounds that propagate, even at a great distance along the ridges and valleys of the Apennines. This phenomenon has its maximum at night, which greatly amplifies the "wild beauty".
Females become fertile deer in late summer and tend to gather in small groups. The "heat" of females by males is warned: the competition is very strong and repeated clashes are established to define the hierarchy between dominant males. The disputes are rarely resolved by physical violence, because it would be risky for both sides, but through an indirect system that works from a distance. Males occupy a group of females, maintain their privileged position by issuing the classic belling , that is a long sound when exhaling, the duration and intensity gives a measure of the size of the chest and then his strength and power.
