The term 'Large Ducks' can be summarized by two crossword solutions: Eiders (6 letters) and Pekins (6 letters). Eiders are large sea ducks that are found in the Northern Hemisphere, particularly in coastal areas of the Arctic Ocean. They are known for their thick, warm feathers which are used to make down jackets and other winter clothing. Pekins are a breed of domestic duck that originated in China. They are the most popular breed of duck for meat production and are also kept as pets.