On this double CD are some of the most beautiful, unusual and strange bird songs Jean C. RochE has recorded form the four corners of the Earth during his 40 year career? These songs often contain hidden, very pleasant, music than can be heard with recordings in slow motion. A booklet contains humoristic drawings by the talented Alexis Nouailhat. The double CD contains the songs of 84 bird species recorded in Europe, Africa, North and South America, Asia and Australia, plus 39 songs at a reduced speed; in all 123 tracks in stereo with over 2 hours playing time. The set includes a 36 page booklet, with 84 colour drawings (one for each species) and detailed explanatory text: date and location of the recording, species and speed reduction coefficient (2 or 4 times).