Birdsong and human song

Here is a site on bird song, and yes I am recommending the actual music clips.  The slowed down versions sound like Miles Davis.  The accompanying book is excellent, and not only because you can read it in an hour.

If you want music by humans, try Lee Perry's new four-CD collection I Am the Upsetter; it is the best Perry anthology (better than Arkology or Open the Gate, although buy all three) and therefore one of the best CDs sets, ever.