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August 28, 2012 — Rock County

Rock River Lagoon. Diversion of the Rock River that forms an elongate, shallow lagoon in Riverside Park, Beloit. The lagoon is about 110 m wide (E-W) and 225 m long (N-S), has some grasses growing around the edge, and is aerated with a fountain. Located on the west of Riverside Drive, about 0.5 km north of the intersection with White Avenue.

Black Saddlebags (Tramea lacerata)
Observed
A few seen in flight
Blue Dasher (Pachydiplax longipennis)
Photographed
Only males seen, mainly associated with floating cyanobacterial mats. Common. (1 photo)
Eastern Amberwing (Perithemis tenera)
Photographed
Several seen, also mainly associated with the cyanobacterial mats. (1 photo)
Eastern Pondhawk (Erythemis simplicicollis)
Photographed
Only females seen. Common. All associated with sedges on southwestern part of the lagoon. (2 photos)
Halloween Pennant (Celithemis eponina)
Photographed
Only one male seen (1 photo)
Eastern Forktail (Ischnura verticalis)
Photographed
Several males and females seen (2 photos)