Incidental observations on the nesting ecology of Ouachita map turtles (Graptemys ouachitensis) were made at 2 sites on the Wisconsin River, Iowa County, Wisconsin, during research on the use of electric fencing to decrease turtle nest predation. Sites were continuously monitored by digital trail cameras during the 2008–2011 reproductive seasons. Turtles nested in a bimodal diel pattern overall, the result of a reduction of midday nesting activity on relatively warm days. Nesting duration was relatively short compared to most emydids and was inversely correlated with ambient air temperatures. Precipitation within 24 hrs prior to nesting was not associated with levels of nesting activity. Younger nests appeared to have greater survival during short-term flooding events than did older nests.
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