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  1. Eastern Ratsnake – PA HERP IDENTIFICATION

  2. Snakes | Fish and Boat Commission | Commonwealth of Pennsylvania - PA.GOV

  3. Summary Of Black Snakes In Pennsylvania - AZ Animals

  4. Eastern Rat Snake - National Wildlife Federation

  5. #bioPGH Blog: Eastern Black Rat Snake | Phipps Conservatory …

  6. Pennsylvania Snakes Identification Guide (Complete Catalog)

  7. 5 Black Snakes in Pennsylvania (With Pictures) - Animal of Things

  8. Snakes of Pennsylvania: 21 species, 3 of them venomous

  9. Black Snakes Of PA: Identification, Habitat ... - Scale Companions