Dunlin
Calidris alpina

These small waders are present all year, but are much more common in the winter (these birds are in winter pluamge). They often associate with other small waders, such as Sanderlings and Ringed Plovers. They are the commonest winter wader in Britain. The summer plumage is a brownish back and black belly.
 

  

1-2: Ryde, IOW, 01/11/2006.