Source : Webster's Revised Unabridged Dictionary (1913)

Tattler \Tat"tler\, n.
   1. One who tattles; an idle talker; one who tells tales.
      --Jer. Taylor.

   2. (Zo["o]l.) Any one of several species of large,
      long-legged sandpipers belonging to the genus {Totanus}.

   Note: The common American species are the greater tattler, or
         telltale ({T. melanoleucus}), the smaller tattler, or
         lesser yellowlegs ({T. flavipes}), the solitary tattler
         ({T. solitarius}), and the semipalmated tattler, or
         willet. The first two are called also {telltale},
         {telltale spine}, {telltale tattler}, {yellowlegs},
         {yellowshanks}, and {yelper.}

Source : WordNet®

tattler
     n 1: someone who gossips indiscreetly [syn: {tattletale}, {taleteller},
           {talebearer}, {telltale}, {blabbermouth}]
     2: any of several long-legged shorebirds having a loud
        whistling cry