In 2010, over 300 bat survey routes on lakes and rivers were developed to help inventory bat species distribution in Wisconsin and investigate changes in relative abundance over time. These standardized routes are known as the BATLAS routes since they have helped inform a statewide inventory of bats, or a Bat Atlas. Each route is roughly 8km in length and takes between 1 and 2 hours to paddle. These surveys have allowed the Wisconsin Bat Program to track impacts on bat populations from white-nose syndrome across the summer landscape. If you want to learn more about how to survey bats by boat, please contact DNRbats@wisconsin.gov!