Enjoying the beautiful singing of the birds, was asked yourself why do birds sing?
Spring singing for the birds - it's serious and important. Sing only males. Arrives a male from distant lands to their homeland and loudly starts a song, which warns. "This is my place, I took it and intends to live here and raise Chicks!" Neighbors-the rivals know that the place is occupied, and if someone dares to disobey - beware, there will be a fight!
Taking the place of the male sonorous song attracts girlfriend. Female song will hear and will fly it, of course, if the song she will love it. If not, choose another male that sings better and louder.