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DNR Mammal Ecologist J Paul White conducted a two week survey with two detector units (placed by the Trumpeter Blind and the northeast corner berm) in July. The units detected sounds from seven of the eight bat species in Wisconsin including the Evening Bat which is new to the state as of 2016. Compared to surveys done in 2010 and 2018 for shorter periods and closer to the Bark River, there were more Hoary and Silver-Haired bats and less Little Browns this year than in the past. Little Browns have been hit harder by the white-nose syndrome than other species which may explain the difference. In 2010 and 2018, five and four species were noted...so if there were seven, it's an encouraging sign. Of the seven, Big Brown, Hoary and Silver-Haired were prolific while the Hoary, Little Brown and Evening Bats were less commonly heard and the Eastern Red, while noted as present, was infrequent and could have been a misidentification. The only bat not heard was the Northern Long-Eared Bat which is both state threatened and federally endangered. 
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