About
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.
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.
