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Sound guide with comments allowing an easy approach to discover and memorize the songs of common birds.
Ideal Cd for all the beginners. An identification of 70 songs d' allows; birds. The best Chiff-Chaff sale 1st half of 2010.
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.