The Great Northern Diver, also known as the Common Loon, is a large waterbird found in northern regions of North America and Eurasia. It is recognized for its striking black and white plumage, sharp bill, and distinctive haunting calls. This bird is an excellent swimmer and diver, often hunting for fish and invertebrates underwater. During the breeding season, the Great Northern Diver prefers freshwater lakes, where it builds its nest near the water's edge. In winter, it migrates to coastal marine environments. The species is known for its unique courtship displays and strong parental care, making it a fascinating subject for birdwatchers and nature enthusiasts alike.