Stejneger's scoter

Stejneger's scoter (Melanitta stejnegeri), also known as the Siberian scoter, is a large sea duck. The genus name is derived from Ancient Greek melas "black" and netta "duck".

There are a number of differing characteristics of Stejneger's scoter and the white-winged scoter. Males of the white-winged scoter have browner flanks, dark yellow coloration of most of the bill and a less tall bill knob, approaching the velvet scoter. The male Stejneger's scoter has a very tall knob at the base of its mostly orange-yellow bill. The males of both species are very similar and best distinguished by head shape; White-winged scoters tend to have "two-stepped" profile between the bill and the head, compared to the long "Roman nose" profile of Stejneger's scoter similar to that of a common eider. Additionally, the feathering along the base of the upper mandible forms a right angle on the white-winged scoter, compared to the acute angle on the Stejneger's scoter.