Pennsylvania fishermen like Russ Collins are worried about trees.

He lives in Palmyra, Lebanon County, and is the vice president of Trout Unlimited’s southcentral region.

He wonders whether a struggling tree species could ultimately endanger one of the top fishing grounds in the country, if not the world.

He sees, first-hand, how the iconic hemlock — Pennsylvania’s state tree — is under siege and is dying off.

Read more at Pittsburgh Tribune-Review.