John Shaw / Common eider duck (Somateria mollissima) female defending her nest from arctic fox (Vulpes lagopus). Longyearbyen, Spitsbergen. June.

Espen Bergersen / Common eider (Somateria mollissima) swimming in the Jokulsarlon lake. Iceland, May.

Espen Bergersen / Common eider (Somateria mollissima) resting on ice. Iceland, May.

Espen Bergersen / Common eider (Somateria mollissima) performing courtship postures between ice bergs in the Jokulsarlon Lake, Iceland. May.

Espen Bergersen / Common eider (Somateria mollissima) between ice bergs in the Jokulsarlon lake. Iceland, May.

Mike Read / Common eider (Somateria mollissima) female swimming in Loch Fleet, Sutherland, Scotland, UK, May.

John Shaw / Arctic fox (Vulpes lagopus) carrying Common eider duck egg (Somateria mollissima) after raiding nesting colony. Longyearbyen, Spitsbergen, Svalbard, Norway. June.

SCOTLAND: The Big Picture / Orca (Orcinus orca) hunting an Eider duck (Somateria mollissima) chick , Shetland, Scotland, UK, July.

SCOTLAND: The Big Picture / Killer whale (orca) hunting an Eider chick (Somateria mollissima), Shetland, Scotland, UK, July.

Pal Hermansen / King eider duck (Somateria spectabilis), males swimming in same direction. Finnmark, Norway. March.

Pal Hermansen / King eider (Somateria spectabilis) diving for food. Finnmark, Norway. March.

Jeff Vanuga / Arctic fox (Vulpes lagopus) standing with Common eider (Somateria mollissima) egg in mouth. Svalbard, Norway. June.