Common Loon Size

28-36" (71-91 cm). Unmistakable in elegant summer plumage, with black head and boldly checkered back. Resembles other loons in winter; note thick bill, wedges of dark and light pattern at base of. The common loon is named appropriately as it is the most common of the loons, and it is also known as the great northern diver. This heavy, goose-sized waterbird varies considerably in size, ranging from. The Common Loon is a large and mainly aquatic bird. Males are generally larger than females. Adult body length ranges from 71 to 92 cm (28 to 36 inches) with wingspans to 147 cm (58 inches). Weight. Common loons reach a size of 28 to 32 inches (71 to 81 centimeters) in length with a wingspan of about 46 inches (117 centimeters). They can weigh between 9 and 12 pounds (4 and 5.5 kilograms). A large, heavy-billed loon. Common and widespread in North America; somewhat less common and more local in Europe. Breeding adults have gorgeous black-and-white patterning; especially note.

Over the years, banding studies and other research across North America has shown that adult Common Loons weigh from 6 to 16.5 pounds, with wing spans ranging from 52 to 65 inches—and.