The Great Northern Diver (Common Loon)(Gavia immer) and Black-throated Diver (Arctic Loon)(Gavia arctica) were photographed by Christian Kerihuel in France (Spay near Le Mans). For more excellent photos check out Christian's website at kerihuel. Distribution The Arctic Loon breeds in Eurasia and occasionally in western Alaska. It winters at sea and on large lakes over a much wider range.