Kennywood Amusement Park(Pittsburgh side of the state) was over run last year, near the new Steel Curtain coaster. They seemed to be more concentrated in that side of the park. No clue if Kennywood would allow you in during the off season though, cant hurt to ask if over on this side of the state. I dont know what the eggs look like or the exact plants they seemed to be eating though. I just know they were everywhere while in line for the coaster.