ringneck

 Any one of several species of small plovers of the genus Ægialitis, having a ring around the neck. The ring is black in summer, but becomes brown or gray in winter. The semipalmated plover (Ægialitis semipalmata) and the piping plover (Ægialitis meloda) are common North American species. Called also ring plover, and ring-necked plover.  [1913 Webster]

 The ring-necked duck.  [1913 Webster]