A PDF field guide to the species reported in and around Sag Valley Forest 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 Sag Valley Forest Preserve include American Robin, Common Whitetail, Great Blue Heron, Red-Winged Blackbird and Bullfrog. Plants lead the list with 36 species, followed by 7 birds and 4 insects.
The 20 species reported most often here, of 50 in the full guide.

Buckthorn
Poison Ivy
Mayapple
Purslane
Haymaids
Hedge Garlic
Tell me what you're looking for, and I'll do my best to answer.
Snapweed
Dulcamara
Wild Geranium
Bluebells
Boxelder
Beebalm

American Robin
Common Whitetail
Amur Honeysuckle
Great Blue Heron
Butterflyweed
Tell me what you're looking for, and I'll do my best to answer.
Blackcap