Sean Callahan

History

Sean Callahan is a tree climbing instructor and canopy researcher from Pennsylvania. He has worked with forest insect pests in New York, Arizona, and New Mexico, and hopes to continue studying and protecting the trees he loves so much.

Movies

The Hemlock Woolly Adelgid: A Film About the Loss of an Ecosystem
The Hemlock Woolly Adelgid: A Film About the Loss of an Ecosystem
Self
The Hemlock Woolly Adelgid. It's a species few people have heard of - yet it is devastating the Hemlock forests and the delicate ecosystems that depend upon them. From infestations in our own backyards, the Hemlock Woolly Adelgid has already spread throughout the east coast of North America from the Carolinas up into Canada.