Common Loon molt
The above image shows the beauty of a Common Loon in breeding plumage. Both sexes have this vibrant breeding plumage. Most birds are sexually dimorphic. Loons are not, the only difference between loon sexes is that the male is larger... and not by a lot. The above loon is a male by his larger, blocky head (personal observation). Loons molt on their saltwater wintering waters........... By mid-September (at least throughout the 47th N lat.) Common Loons show first signs of losing breeding plumage. The muzzle becomes grizzled white and the bright, vibrantly red eyes darken. She surfaced less that 20 feet off my bow and was comfortable floating there as she looked in all directions for one of her chicks. By November the gorgeous breeding plumage is altogether gone. This adult female is the mother of two chicks that are over 100 days of age and have decided to stay on the natal pond a while longer. The father loon has already hea...