Habitat: Wooded lakes, ponds, rivers.
- These graceful divers are often recognized from a distance by their head crest. Males have a greenish-black head; females have a rust-colored head.
- In flight, mergansers fly with bill, head, body and tail in an even, horizontal line. They often follow the winding path of rivers and streams.
- Males have a slender, whitish body, with a black back.