Do you know what triggers migration? How do birds find their way to warmer climates? David Allen Sibley, author and illustrator of the <i>The</i> <i>Sibley Guide to Birds</i> will be joining us for a fascinating conversation about birding migration and how our feathered friends heed nature’s call.<br/><br/>David Allen Sibley is the author and illustrator of the series of successful guides to nature that bear his name, including <i>The Sibley Guide to Birds</i>. He has contributed to <i>Smithsonian,</i> <i>Science</i>, <i>The Wilson Journal of Ornithology</i>, <i>Birding</i>, <i>BirdWatching</i> and <i>North American Birds</i> and <i>The New York Times</i>. He is the recipient of the Roger Tory Peterson Award for Lifetime Achievement from the American Birding Association and the Linnaean Society of New York's Eisenmann Medal. He lives and birds in Ma