http://www.indiancreeknaturecenter.org/
Wickiup Hill Learning Center, Linn County, IA
http://www.mycountyparks.com/county/Linn/Park/Wickiup-Hill-Learning-Center.aspx
Butterfly garden and trail in Monona, Iowa
http://www.mononachamber.com/iowa/butterfly-garden.html
Butterfly garden in Bellevue, Iowa
http://www.iowadnr.gov/Destinations/WatchableWildlife/ButterflyGardenatBellevue.aspx
Neal Smith National Wildlife and Habitat Refuge, 20 miles east of Des Moines, IA
http://www.fws.gov/refuge/Neal_Smith/wildlife_and_habitat/index.html
Tallgrass Prairie Center at the University of Northern Iowa, Cedar Falls; producers of a video named America's Lost Landscape: The Tallgrass Prairie. One of the sponsors of the Iowa Roadside Program dedicated to restoring the roadsides of Iowa to native prairie. This would be an excellent field trip.
http://www.tallgrassprairiecenter.org/
Iowa Prairie Plants - maps of plant distribution by county, and of open prairie locations within the state
http://uipress.lib.uiowa.edu/ppi/index.php
http://uipress.lib.uiowa.edu/ppi/index.php