The size of a Common Loon’s territory is typically 60 to 200 acres, although it can be larger or smaller.
Loons are easily disturbed during the nesting season and prefer to nest on lakes where there is little human activity. If there is too much disturbance, loons may abandon their nest.
On its breeding ground, the Common Loon is highly territorial. Its defensive behavior increases during the nesting period and peaks in the first weeks after the chicks hatch.
Loons will usually stay with the same mate and will often use the same nest site year after year.
Nests are built as close to the water’s edge as possible. Islands and coves , which provide protection from predators, are the preferred location for nests.
Both sexes build the bulky nest, which consists of twigs, grasses, reeds, and other aquatic vegetation.