By Joe Holden

RIDLEY CREEK STATE PARK, Pa. (CBS) — An invasive fly has shown up in our region — it’s called the Spotted Lanternfly. It’s doing damage to trees and plants, and an effort is underway to wage a fight against the fly.

The state says “kill ’em,” explaining it’s the only way to stop the invasive Spotted Lanternfly. Ridley Creek State Park Manager Phillip Schmidt hiked a trail at Ridley Creek State Park with Eyewitness News on Monday.

READ MORE: 2022 Wawa Welcome America Festival Guide: Road Closures, Public Transportation Information

What we found of the forewarned little critter was eye-opening.

“Still just seeing it in person blows my mind. They’re on the entire tree, the entire tree is covered with them,” Schmidt said.

Credit: Penn State

The Spotted Lanternfly is native to Asia. For a few years, state officials have warned of its spread into southeastern Pennsylvania.

The invasive pest has no known predators and are capable of destroying trees and crops, potentially costing millions in damage.

Beyond Meat Working On Plant-Based Bacon, Steak

TJ Hockensmith and Taylor Gordon had just hiked by the infestation when we bumped into them on our way.

READ MORE: Rhys Hoskins, Darick Hall Homer, Lead Phillies Past Nolan Arenado, Cardinals

“It was just full, the whole bottom was just encased in them,” Radnor resident Gordon said.

“There’s just a lot of them,” Hockensmith said. “Walking past them was pretty intimidating.”

And then there’s the sticky, tar-like substance they leave behind.

“It’s not a good smell,” Schmidt said.

Watch: Surveillance Video Shows Suspects Wanted For Attempted Robbery Of Armored Car In University City

“We call it ‘dew,’ and if you stand under this tree right now, it seems like it’s raining,” Schmidt said. “It’s the dew coming out of them.”

Pretty disgusting.

The park plans to spray the tree to kill the Lanternflies, Schmidt knows these pests will only move on to their next meal.

MORE NEWS: CBS3 SummerFest: Catch The Ocean Breeze Without Sitting On Sand With Atlantic City Cruises

“We should visit China if we want to see these. We should not have these in our backyard,” Schmidt said. “This skeeves me out. I don’t want to walk by a tree like this.”