Erla Friðriksdóttir: The eiderdown is a natural product, and when the eider duck leaves the nest, they leave the down, and so if we would not take the down, it would just blow away and be useless.

With abundant body fat and thick insulating plumage, this rare sea duck is built for life in the tundra. But the Arctic may be getting too warm for the Steller's eider, and the species is rapidly ...