1. a small North American diving duck with a large rounded head, the male having black and white plumage

Examples

• The bufflehead dove beneath the surface to catch small fish.
• A pair of buffleheads nested near the quiet pond.
• The male bufflehead’s distinctive white patch made it easy to identify.
• Buffleheads migrate south for the winter months.
• We spotted several buffleheads floating on the lake.
• The bufflehead is one of the smallest diving ducks in North America.