This collection contains the transcriptions of the following animals:
- Gray Wolf (Canis lupus)
- Coqui (Eleutherodactylus coqui)
- Cicada (Cicada orni)
- Piano improvisation of a Chimpanzee (Pan troglodytes)
The transcriptions are written in treble clef and bass clef and preceded by a brief description of the species. In some cases, the text incorporates a personal analysis of the song as well.