Sean Callahan

Sean Callahan Trailers

The Hemlock Woolly Adelgid: A Film About the Loss of an Ecosystem Trailer

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.

Most Popular Sean Callahan Trailers

Total trailers found: 1

The Hemlock Woolly Adelgid: A Film About the Loss of an Ecosystem Trailer

The Hemlock Woolly Adelgid: A Film About the Loss of an Ecosystem Trailer (2016)

19 February 2016

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.