With more than 6 hours of listening, this sound document is the most complete existing in this domain. Songs during flight, shouts of migration 350 handled species through 850 recordings make of this work a tool essential to the ornithologists.
The most important collection about bird songs in MP3 - 2 joining together CD MP3 = 17 audio CD - 819 species of Europe, Afric of North and Western Asy - 2817 recordings representing songs and cries - easily accessible.
One of the best guides to learn the songs of the birds !