content: The Echoes of Nature Series is absolutely wonderful! I listen to this CD all the time. In fact,it's playing as I write this review!This CD really makes you feel as if you're right there! There are 7 tracks to choose from, all featuring beautiful relaxing sounds. It is impossible to get tired of,featuring nine different animals. There is one problem- most of the tracks aren't long enough. Still,this is a CD everyone should own!