A PDF field guide to the species reported in and around Historic Mill Creek State Park, with common and scientific names and up to 3 photos of each, laid out for use in the field and offline.
The animals people report most often in and around Historic Mill Creek State Park include Northern Leopard Frog, Eastern Tent Caterpillar, Chalk-Fronted Corporal, Eastern Chipmunk and Question Mark. Plants lead the list with 41 species, followed by 3 insects and 2 birds.
The 20 species reported most often here, of 50 in the full guide.

Dogmint
Bearded Pink
Cowbell
Ghost Pipe

Betony
Heal-All
Tell me what you're looking for, and I'll do my best to answer.
Virgin'S Bower

Northern Leopard Frog

Bobber
Hairy Vetch
Eastern Tent Caterpillar
Chalk-Fronted Corporal
Eastern Chipmunk
Question Mark

Common Bladderwort
Red Sumac

Common Silverweed
Totter Grass
Tell me what you're looking for, and I'll do my best to answer.
Ribwort

Spotted Knapweed