Lesser Scaup

Lesser Scaup (Aythya affinis) is in the Ducks, Geese, and Swans family (Anatidae). Across the U.S., iNaturalist users have logged 33,532 research-grade observations of it in our sample, peaking in January.

Seasonal pattern in the national data: winter visitor. Counts also reflect when people are out photographing, so compare months within a state rather than across states.

When to photograph Lesser Scaup: observations by month (U.S.)

About Lesser Scaup

The lesser scaup (Aythya affinis) is a small North American diving duck that migrates south as far as Central America in winter. It is colloquially known as the little bluebill or broadbill because of its distinctive blue bill. The origin of the name scaup may stem from the bird's preference for feeding on scalp—the Scottish word for clams, oysters, and mussels; however, some credit it to the female's discordant scaup call as the name's source. It...From Wikipedia via iNaturalist — article, CC BY-SA.

Lesser Scaup by state

Main season = months with at least 30% of the state's peak-month count.

Related birds (Ducks, Geese, and Swans)

MallardAnas platyrhynchos

Canada GooseBranta canadensis

Wood DuckAix sponsa

Northern ShovelerSpatula clypeata

BuffleheadBucephala albeola

American WigeonMareca americana

Hooded MerganserLophodytes cucullatus

Ring-necked DuckAythya collaris

Photography tips

• Use a fast shutter (1/2000 s or faster) for birds in flight.
• Focus on the eye and shoot at the bird's eye level.
• Approach slowly and stop if the bird changes behavior; never bait or flush birds.
• Morning activity peaks in the first two hours after sunrise.

FAQ