Birdsong by the Seasons.

Birdsong by the Seasons

Donald Kroodsma

Houghton Mifflin

222 Berkeley St., Boston, MA 02116

9780618753369, $28.00 www.hmhbooks.com

BIRDSONG BY THE SEASONS; A YEAR OF LISTENING TO BIRDS comes with two CDs of birdsong and offers insights into seasonal birds and the different songs they song. Sonograms plot a sound's frequency and analyzes the foundations of melody, while lively discussions cover bird activities and changing seasonal trends. Any library strong in birding and any individual interested in a more in-depth coverage of birdsong than mere identification alone, needs this.