Source : Webster's Revised Unabridged Dictionary (1913)

Cackler \Cac"kler\, n.
   1. A fowl that cackles.

   2. One who prattles, or tells tales; a tattler.

Source : WordNet®

cackler
     n 1: a hen that has just laid an egg and emits a shrill squawk
     2: any of various insectivorous Old World birds with a loud
        incessant song; in some classifications considered members
        of the family Muscicapidae [syn: {babbler}]