Species: call duck
Call ducks are a breed of domestic duck known for their smaller size from other ducks and loud quack. In the past, they were used as decoy ducks in hunting, their loud quacks luring wild ducks into traps or hunter ambushes. Their use in hunting has been superseded by artificial duck calls, and they are raised nowadays as decoration or pets.
More Information:
Wikipedia entry on call ducks.
This tag implicates mallard (learn more).