Bark: A Field Guide to Trees of the Northeast - Author talk by Michael Wojtech October 9, 2011

Many people know how to identify trees by their leaves, but what happens when those leaves that have fallen or are out of reach? With detailed information and illustrations covering each phase of a tree's life-cycle, author and naturalist Michael Wojtech will explain how to identify trees by their bark—the one tree characteristic that’s visible all year round. Learn about the structure and ecology of tree bark and how its different traits evolved. Free with museum admission.

Official Website: http://www.hmnh.harvard.edu/lectures_and_special_events/index.php#national