The Lesser Scaup is a medium-sized diving duck with a small peak at the back of the head. From the small peak, the back of the head and neck is flat, not rounded as it is on Greater Scaup.
Larger than a Green-winged Teal, smaller than a Canvasback.crow-sized
- Both Sexes
- Length: 15.3-18.1 in (39-46 cm)
- Weight: 16.0-38.4 oz (454-1089 g)
- Wingspan: 26.8-30.7 in (68-78 cm)