Place
- Decatur4
- Iowa City4
- Iowa River, Amana4
- Montgomery4
- Old Stone House4
- Red Rock4
- Tama4
- Bixby, north of Edgewood3
- Central Iowa3
- Decorah3
- Hacklebarney Woods County Park.3
- Hardin3
- Jasper3
- Lee3
- Maquoketa River valley and adjacent bluffs, Backbone State Park, north of Dundee3
- Near Payne3
- Palo Alto3
- Pine Creek hollow3
- Plymouth Rock3
- Pottawattamie3