Newsletter Signup

To be added to the SIOSA email list to receive the quarterly SIOSA newsletter and information on events, email

Upcoming Events

For Lands Sake! and Winterset Library One Earth Book Club:

Tuesday, Jan. 23: “Sylven T. Runkel: Citizen of the Natural World” — Stone and Stravers

Meet at 7:00 PM at Winterset Library


Decatur County Christmas Bird Count: Saturday, Dec. 16. Meet at 7:30 a.m. at the Kum and Go near the Iowa visitor center.


Next SIOSA board meeting

Thursday, December 14, 1:00 PM at Decatur County Conservation Board office west of Leon, 20401 River Road.

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: