Naïve estimates (number of sites where we observed each species relative to the total number of sites we surveyed) from nighttime call surveys during 2002 to 2005.

NS = the Neal Smith National Wildlife Refuge from 2004 to 2005; UMR = the Upper Mississippi National Wildlife and Fish Refuge from 2002 to 2004 and 2005 (when we changed sampling locations from the previous years); SCNSR = the St. Croix National Scenic Riverway from 2002 to 2004 and 2005 (when we changed sampling locations from the previous years); VNP = Voyageurs National Park from 2002 to 2005. Dashes indicate management areas outside of the described range for that species.1 This management area was very close to the edge of the described range of this species. We did not detect it there.Naïve estimates (number of sites where we observed each species relative to the total number of sites we surveyed) from nighttime call surveys during 2002 to 2005.