Silphium borer moth found near Grinnell

October 22, 2026
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A (Papaipema silphii) was recorded on 2026-10-03 in Grinnell during its adult flight period.1 This threatened prairie specialist depends on Silphium plant roots for larval development and occurs in fragmented mesic prairie habitat.1 The observation indicates functional prairie habitat remains in the area where this rare Midwestern moth can persist.1

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