Common Loon, Great Northern Diver

The Common Loon is a large, striking waterbird known for its haunting, beautiful vocalizations and striking black-and-white breeding plumage featuring a checkered back, black head, and red eye. They are specialized diving birds capable of plunging down to 200 feet in search of fish. Their heavy bodies require a long running takeoff across the water to become airborne.

Dark, nearly black to deep charcoal-grey coloration across the distal portion of the feather transitioning to a pale, frosty grey and white base near the calamus. The melanin-rich dark coloration provides structural strength and durability, while the lower shaft is stark white.

Tightly interlocked pennaceous structure along the vane with well-developed barbicels providing high rigidity and waterproofing. The base exhibits minor plumulaceous (fluffy) downy barbs. The barbs are intact and well-maintained.

Smooth, glossy, and firm texture with a sleek, water-repellent surface designed for an aquatic diving bird. The leading edge is stiffer and sharper than the trailing edge.

Striking dark charcoal to black vane contrasting sharply with a bright white rachis and white base, combined with a stiff, highly asymmetrical contour typical of specialized aquatic flight feathers.

Large freshwater lakes, forested lakes, and boreal forest wetlands during the breeding season; winters primarily along sheltered marine coasts, bays, and large inland reservoirs.

Breeds across northern North America including Alaska, Canada, and the northern tier of the United States (such as Minnesota, Wisconsin, and Maine). Winters along the Pacific and Atlantic coasts of North America as well as the Gulf of Mexico.

Acting as top aquatic predators and apex consumers of fish in freshwater lake ecosystems, Common Loons serve as important bioindicators of aquatic health and mercury contamination levels.

Other large waterbirds such as cormorants (Double-crested Cormorant) or mergansers. Cormorant feathers tend to lack the specialized waterproofing and stark white basal contrast found in loon flight feathers.

Loons have solid bones rather than hollow ones like most flying birds, which helps them reduce buoyancy and dive efficiently underwater. Their legs are placed far back on their bodies, making them exceptionally strong swimmers but clumsy and virtually unable to walk on land.

Good condition, clean with minimal fraying or wear, showing a healthy intact vane and strong structural integrity.

Northern Minnesota near a lake.