Image, physical traits, habits, and distribution of Somateria mollissima.

Physical appearance, range, behavior, and nesting of this bird.

Illustrations, physical traits, and habitat of four species of eiders.

Image, description, distribution, and ecology of this species.

Photos, identification tips, Christmas Bird Count map, and taxonomy chart.

Narrative includes facts about this bird's physical characteristics, natural history, and conservation status.

Identifying traits, life history, and taxonomy of this species.