Merganser (noun)

A type of duck that has a narrow, serrated bill, and a crest on its head. They are fish-eating ducks and they use their bill to catch their prey.

Origin:

From latin mergus, meaning "diver" and anser, meaning "goose".

Examples:

1. The common merganser is a large duck that breeds in the northern hemisphere.
2. The hooded merganser is a small duck that is found in North America.
3. The red-breasted merganser is a sea duck that is commonly found along coastal areas.
4. Mergansers are known for their fish-eating habits and they use their serrated bill to catch their prey.
5. Mergansers are protected under the Migratory Bird Treaty Act.