What is "call duck"

The Call Duck is a bantam breed of domesticated duck raised primarily for decoration or as pets. Call ducks look similar to some other duck breeds, but are smaller in size. Call ducks were initially used in hunting, where their own calls and quacks would attract wild ducks towards the hunter's guns. This practice has almost entirely been replaced with artificial Duck calls, with Call ducks now being kept primarily as pets or for ornamental purposes.