Learning Outside the Classroom

Mrs. Anderson’s biology classes took a field trip to Harvard Forest on April 14.


The purpose of the trip was to learn more about the Hemlock Woolly Adelgid and its impact on the forest.

Native to Asia, the Hemlock Woolly Adelgid is a small insect that threatens the health and sustainability of eastern hemlock and Carolina hemlock in the Eastern United States. Hemlock woolly adelgid was first reported in the Eastern United States in 1951 near Richmond, Virginia. By 2005, it was established in portions of 16 States from Maine to Georgia, where infestations covered about half of the range of hemlock. Areas of extensive tree mortality and decline are found throughout the infested region, but the impact has been most severe in some areas of Virginia, New Jersey, Pennsylvania, and Connecticut.

While at the Harvard Forest, students met with Dr. David Orwig, chief researcher of the Hemlock Woolly Adelgid and Pam Snow.


They saw first-hand the effects of the Hemlock Woolly Adelgid on infested trees and also viewed the insect up-close under a microscope.



Dr. Orwig also shared tree cores from hemlock trees whose growth rings tell the story of decline due to the pests.