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Upcoming Events

Saturday, June 23, 10:45 AM (Note: Time Change!): Prairie Walk at Bobwhite State Park, Wayne County –Led by Wayne Co. Conservation Naturalist Hannah Wiltamuth. Walk the Prairie Trail at the state park and learn about prairie plants and birds and restoration work done in the area. Hosted by SIOSA and Wayne Co. Conservation.

Sunday, July 22, 10:30 AM – 12 noon at Slip Bluff County Park, Decatur County — Monarch and Milkweed Monitoring. Monitoring for Monarchs, milkweeds and nectar plants was done at Slip Bluff County Park at three areas of the park in 2016 and one area of the park in 2017. In 2018, monitoring using the Monarch Larval Monitoring Project protocol will continue with a field day for the public to learn about the monitoring and participate. Monarch density and milkweed density studies will be done on the east side of the lake and possibly in the East Oak Savanna area. A list of flowering plants will also be made. Educational materials will be provided. Drinks and snacks will be provided. Email if you plan to participate.

Next SIOSA board meeting

The next regular SIOSA meeting is Wednesday, April 4 at 1:00 pm.  We will be meeting at the Clarke County Conservation Board headquarters at East Lake Park.  The park is located just east of Osceola on Hwy 34.

Field Journal September 1-15

Monday, September 18, 2017 @ 02:09 PM
posted by veronica

Field Journal:  September 1-15, 2017

By Sibylla Brown, Timberhill Oak Savanna

Bill and I began this month at Timberhill with a family gathering to celebrate our 55th wedding anniversary.  Chris, his wife Agustina, Alex, grandson Hugo and his friend Ajin spent the entire weekend with us.  The warm sunny days were perfect for long walks and butterfly forays. 

Bill, Hugo and Ajin netting a butterfly


On Labor Day Bill photographed this Dion Skipper nectaring on Rough Blazing Star in the prairie remnant above the West Creek bottom field.  An infrequent breeding resident in Iowa, the Dion Skipper is uncommon almost everywhere.  In Iowa it is restricted to wetlands in the northern half of the state and has never been recorded at any other Decatur County site.  Its larvae feed on Tussock Sedge.  It has been observed at Timberhill (12 miles north of the Iowa-Missouri border) every year since July 2009, four years after we began restoring the West Creek sedge meadow. When we purchased this unit the sedge meadow was overgrown with elm and red cedar.  A raw ditch separated the north and south portions of this unit.  Now a sward of Tussock Sedge fills that space. To the south is the restored sedge meadow. Perfect Dion Skipper habitat.  But how this skipper survived the years of habitat degradation is a puzzle.

Dion Skipper on Rough Blazing Star


I finally collected an underwing moth on September 15.  In a normal year underwing moths come to our lights between mid-June and mid-October.  So far we have identified 15 species at Timberhill. The Obscure Underwing, Catocala obscura, on September 15 was the first of the season. Hopefully there will be more before the winter sets in.

The abundant bloom on Rough Blazing Star and goldenrod is attracting lots of butterflies.  Besides the resident species, southern migrants including Sachem and Fiery Skippers and a Variegated Fritillary were on wing the first two weeks of September. Hundreds of Painted Ladies migrated through here as well.  We continue to see several Monarchs daily.  

Yellow Patches, Amanita flavoconia


Despite the continuing drought I found a few ectomycorrhizal mushrooms. Two clumps of poisonous Yellow Patches, Amanita flavoconia, were fruiting on the trail through our West 40 on September 4.  The Brittle Cap Russula tenuiceps was abundant on the same trail.  Another puzzle since we have had so little precipitation.  It finally began raining here on September 15.  Hopefully that was just a prelude.   

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