Listen to Natures Song (River Theme) online. Natures Song (River Theme) is an Unknown language song and is sung by Nature Collection. Natures Song (River Theme), from the album The Best Nature Sounds Collection – Ocean Sounds, Birds for Sleep and Relaxation, Sonidos de la Naturaleza, Sons de la Nature, Water Sounds, Guitar & Piano Music, was released in the year 2015. The duration of the song is 4:30. Download Unknown songs online from JioSaavn.