A PDF field guide to the species reported in and around Irwin Prairie State Nature Preserve, 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 Irwin Prairie State Nature Preserve include Slender Spreadwing, Double-Striped Bluet, Calico Pennant, Six-Spotted Tiger Beetle and Sedge Sprite. Plants lead the list with 27 species, followed by 19 insects and 2 amphibians.
The 20 species reported most often here, of 50 in the full guide.

Betony
Snow Trillium
Slender Spreadwing
Double-Striped Bluet
Wild Geranium

Marsh Rose
Tell me what you're looking for, and I'll do my best to answer.

Pleurisy Root
Calico Pennant
Tuliptree
Six-Spotted Tiger Beetle

Sedge Sprite

Northern Leopard Frog

Sassafras

Gayfeather

Winged Lythrum

Koi

Balmony
Tell me what you're looking for, and I'll do my best to answer.
Allspice

Redroot