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Upcoming Events

For Lands' Sake Tours June 4, 3:30 PM - Nelson/Johnson tour: The Nelson walk will highlight some native prairie plants as well as Oak Savanna natives. Our timber floor has successfully burned for 3 years in a row. We have also had some thinning done with some clearing of down trees. This tour will provide a side-by-side comparison of a managed timber to the North of the driveway with an overgrown mess to the South. As I am still learning to ID native plants myself, some you are sure to see are Purple Milk Weed, Lead Plant, Jack in the Pulpit, Green Dragon Plant, a variety of sedges, and many more. Most of the terrain is hilly, so please come prepared with proper walking shoes and a walking stick if preferred. There will be prairie remnant on both sides of the fence. The Johnson property has been managed for 20+ years. DIRECTIONS: 2533 290th Street Peru, just SW of the town of Peru (located SE of Winterset). Take Peru Road to the stop sign in the town of Peru. Turn South on Odell Ave. Odell Ave. will quickly turn into Brown Street. Proceed West on Brown Street out of town (the road will turn into Gravel). The gravel road will come to a Y intersection. Stay to the right of the Y intersection to continue West on 290th Street. You will immediately notice a house to the North. Our driveway is just past the house on the North, just before you reach the bridge. There is a sign with our Name and address at the entrance of the driveway. June 25, 3:30 PM - The Shirm property and two adjoining pieces, managed for 20+ years primarily for hunting. A very high quality landscape with diverse remnants, savannas, and a prairie reconstruction. Details will be provided nearer the date.

Next SIOSA board meeting

Thursday, August 3, 7:00 PM at Decatur County Courthouse in Leon.

Membership/Contact Us


A new exclusive benefit for members: SIOSA will now lend out restoration equipment to members. Please email Items that can be borrowed include: nomex shirts, fire brooms, drip torches, fire rakes, bladder bags and slip-on pump units.

Click here for terms of equipment use


Support Oak Savanna Habitat Restoration by Joining SIOSA!

Members will receive a quarterly newsletter and will be invited to participate in fun activities relating to oak savannas throughout the year!

Annual Membership Rates

  • Student Member $10
  • Savanna Friend $25
  • Supporting Member $100
  • Sustaining Member $250
  • Savanna Steward $500

Please click here to download our membership form



Contact Us

President – Casey Campbell
Vice President – Bill Brown
Treasurer/Secretary – Dick Hillyard
Administrative Assistant – Veronica Mecko

John Orvis
Dick Hillyard
Rich Erke
Dave Whittlesey
Casey Campbell
Bruce Nelson
Andrew Kellner
Nancy Forrest
Bill Brown
Bill and Sibylla Brown
John and Sharon Orvis
Paul and Karla Gunzenhauser
Dick and Nancy Hillyard
SIOSA Mailing Address: 21654 295th Ave, Leon Iowa, 50144
SIOSA Email Address: