The book deals with the capture, maintenance, and training of about sixty species of song birds.
It also included methods to maintain birds and to stimulate them to sing.
[1] He noted that the territory of a singing nightingale was “un tiro di sasso lontano dove canta” - about a circle as wide as a long throw of a stone.
[2] Valli's book served as a source for several other Italian works on birds.
[3] This includes Giovanni Pietro Olina;s 1622 work Uccelliera, which plagiarised considerable portions of Valli's book and achieved greater popularity.