The Wisconsin Department of Natural Resources (DNR) asks the public to report any black bear den locations they find across Wisconsin to support a new research study.  Conducted by the department’s Office of Applied Science, the study will analyze the reported dens and generate estimates of reproductive rates within each bear management zone. These estimates will improve the accuracy of the population models for those zones. Black bear dens are often difficult to locate, making public reporting essential to collecting data to support the study and increase the accuracy of the black bear population model. Known dens from prior years can be useful if they are still in use, and the public is encouraged to report as much information about the den’s location and recent use as possible.