The loon will look underwater, moving its head from side to side to locate prey. It then aims and dives quickly. It will stay underwater for almost a minute and can dive as deep as 80 m.
They build their nests close to the water, with the best sites being completely surrounded by water, such as on an island, muskrat house, half-submerged log, or sedge mat—a clump of grass-like water plants.
Their diet is mostly fish, crayfish, frogs, snails, salamanders, and leeches.
They may not be hunted and they are vulnerable to the effects of pollution, development, and disturbance. They also die of lead poisoning after having eaten fish containing lead.
They migrate to warmer areas around the Gulf of Mexico and on the east and west coasts of North America for the winter.
Average speeds of 120 km per hour throughout migration.
It has a black-and-white checkered back, glossy black head, and characteristic white necklace
around the throat. It is one of the biggest ducks.
Courtship and mating are a quiet time, with the pair swimming and making short dives together. Ultimately the male leads the female to a suitable spot on land for mating.
Tree needles, leaves, grass, moss, and other vegetation are found under loon eggs.
Chicks can swim right away. After their first day or two in the water, they do not come back to the nest.
Source : Hinterland, 1996