Loon Species
The Common Loon (Gavia immer) is one of five species of the family of birds known as Gaviidae, and the only loon species to breed in New York, primarily on the lakes of the Adirondack Park.

Three of the other species, Yellow-Billed (Gavia adamsii), Red-Throated (Gavia stellata) and Pacific loons (Gavia pacifica), breed in northern North America on arctic waterbodies, and are occasionally observed in New York during migration. Arctic loons (Gavia arctica) live on waterbodies in northern Europe and Asia, and look very similar to Pacific loons.

Looks like a loon?  Is it a loon?