Dark Side of the Loon (2008)

The wild call of the loon captivates those of us who spend time on northern lakes and pond, but when the ice forms, they are out of sight and out of mind. Where do they go in winter? How do they survive? THE DARK SIDE OF THE LOON follows two unique biologists who study loons in winter off the coast of North Carolina and in Morro Bay, California. You'll meet a wildlife veterinarian who has necropsied over 1,000 dead loons. We learn how loons are helping scientists understand sources and sinks of mercury and about the threats loons face in winter.