The common loon is a large aquatic bird found in North America, particularly in Canada and the northern United States. It is known for its striking black and white plumage, especially during the breeding season. Common loons are excellent divers, capable of reaching depths of up to 200 feet in search of fish, their primary food source. These birds are also recognized for their haunting calls, which can be heard echoing across lakes. Common loons typically nest on freshwater lakes, laying one to three eggs in a shallow scrape near the water's edge. Their presence is often an indicator of a healthy aquatic ecosystem.