For many, the haunting call of the loon is an important part of the New Hampshire lake experience. Often seen as a symbol of the northern wilderness, loons are a beloved fixture on New Hampshire lakes, and many lake-goers enjoy watching them as they raise their young. However, the breeding season can be a vulnerable time for loons; they face many threats while on our lakes. This presentation will focus on the biology and life history of loons, the threats that loons face, and the work that the Loon Preservation Committee and our volunteers have performed since 1975 to help recover New Hampshire's threatened loon population.