ECHO CALLS INC Open Water Duck Bourbon Single Reed Acrylic. These calls generate a ringing hail call that will attract ducks at several hundred yards yet they are also very ducky and blow soft when the ducks are in close. It has a loud raspy quack and a real nasty hen sound that ducks really flock to. Specifications for ECHO CALLS INC 77758 Open Water Duck Bourbon Single Reed Acrylic: Manufacturer: Echo Calls Color: Bourbon Fabric/Material: Acrylic Species: Duck ECHO CALLS INC 77758 Open Water Duck Bourbon Single Reed Acrylic