sawbill
A sawbill is a colloquial term often used to refer to certain species of ducks belonging to the genus Mergus. These ducks are characterized by their long, narrow beaks that are serrated or "toothed" along the edges, giving them a saw-like appearance. This specialized beak is adapted for grasping slippery prey, primarily fish, which they catch by diving.
Sawbills are found in freshwater and saltwater habitats across the Northern Hemisphere. They are skilled swimmers
The most well-known sawbill species include the common merganser (Mergus merganser), red-breasted merganser (Mergus serrator), and