1. small North American diving ducks with black and white plumage, the males having a large white patch on the head

Examples

• The buffleheads dove beneath the surface of the lake searching for small fish.
• A pair of buffleheads nested near the wooded shoreline.
• Birdwatchers gathered to observe the migrating buffleheads in the bay.
• The male buffleheads displayed their distinctive white head patches during courtship.
• Buffleheads are among the smallest diving ducks in North America.
• The pond attracted several species of waterfowl, including buffleheads and mallards.