June 19, 2021 — Marathon County
Marathon County, WI ;(southwestern portion of Marathon County);(in SW 1/4 of section 17 in McMillan Township).
McMillan Marsh State Wildlife Area ; (0.3 miles north-northwest from Marsh Road public parking area).
Little Eau Pleine River (I recorded images from east side of river while walking along river bank on a wildlife runway.
Confirmed as male Horned Clubtail (Arigomphus cornutus) through Dan Jackson ("Midwest Odonata" FB page).