Where to see a Gray Hairstreak in Illinois

The Gray Hairstreak is recorded in the counties of 18 Illinois state parks (research-grade iNaturalist observations). Ranked by how often it is observed in each area:

1. Stephen A Forbes State Park
2. Wolf Creek State Park
3. Eagle Creek State Park
4. Hidden Springs State Forest
5. Sand Ridge State Forest
6. Hazlet State Park
7. South Shore State Park
8. Wayne Fitzgerrell State Park
9. Fort Chartres State Park
10. Fort Kaskaskia State Park
11. Hennepin Canal Parkway State Park
12. Randolph County State Recreation Area
13. Morrison-Rockwood State Park
14. Johnson Sauk Trail State Park
15. Prophetstown State Recreation Area
16. Fox Ridge State Park
17. Walnut Point State Park
18. Lincolns New Salem State Park

These are county-level records — the species is documented in the area around each park, which is a strong steer rather than a guarantee for the park itself.

Gray Hairstreak in other states → · All Illinois state parks →