The grand, and rarely seen on Cape Ann, King Eider, has been spotted for several weeks foraging in Essex alongside a raft of Common Eiders. It was too windy for my camera to capture a beautiful still close-up, but here you can see him diving for mussels at Conomo Point. The more typically seen male Common Eider, behind the King Eider in the footage, is also foraging for mussels.  Amazingly, eiders swallow mussels whole! They have super strong gizzards that can digest the mussels, shell and all.