The Collaborative International Dictionary of English v.0.48:

Plover \Plov"er\, n. [OF. plovier, F. pluvier, prop., the rain
   bird, fr. LL. (assumed) pluviarius, fr. L. pluvia rain, from
   pluere to rain; akin to E. float, G. fliessen to flow. See
   Float.]
   1. (Zool.) Any one of numerous species of limicoline birds
      belonging to the family Charadrid[ae], and especially
      those belonging to the subfamily Charadrins[ae]. They
      are prized as game birds.
      [1913 Webster]

   2. (Zool.) Any grallatorial bird allied to, or resembling,
      the true plovers, as the crab plover (Dromas ardeola);
      the American upland, plover (Bartramia longicauda); and
      other species of sandpipers.
      [1913 Webster]

   Note: Among the more important species are the blackbellied
         plover or blackbreasted plover (Charadrius
         squatarola) of America and Europe; -- called also
         gray plover, bull-head plover, Swiss plover, sea
         plover, and oxeye; the golden plover (see under
         Golden); the ring plover or ringed plover
         (Aegialitis hiaticula). See Ringneck. The piping
         plover (Aegialitis meloda); Wilson's plover
         (Aegialitis Wilsonia); the mountain plover
         (Aegialitis montana); and the semipalmated plover
         (Aegialitis semipalmata), are all small American
         species.
         [1913 Webster]

   Bastard plover (Zool.), the lapwing.

   Long-legged plover, or yellow-legged plover. See
      Tattler.

   Plover's page, the dunlin. [Prov. Eng.]

   Rock plover, or Stone plover, the black-bellied plover.
      [Prov. Eng.]

   Whistling plover.
      (a) The golden plover.
      (b) The black-bellied plover.
          [1913 Webster] Plow

The Collaborative International Dictionary of English v.0.48:

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

   2. (Zool.) The ring-necked duck.
      [1913 Webster]