(Common) Eider
Somerteria mollissima
The coast of Scotland is good for shots of Eider, although they can be quite wary of people. These two are males.
 
  
These are female Eider and ducklings.
 
  
  
1: Rothesay Harbour, 05/06/2005.
2: Cumbrae, 04/06/2005.
3-6: North Berwick, 25/06/2005.