A recent analysis of breeding success and population dynamics in our northern Wisconsin study area has us deeply worried about the future of this population. A study 12 years ago suggested that the loon population of northern Wisconsin was stable. In the past decade, though, the rate of chick production per territory has fallen. Furthermore, the number of territories in use in our study area among the 200 or so lakes that we cover has also fallen slightly. You can read all about the worrisome trends in breeding success and young adult survival in our scientific paper. Having recently discovered that our population is in trouble, we have now turned our attention to learning the cause or causes of the decline and trying to reverse it.