Haydels Duck Gadwall Call. With the increase in the population of gadwalls over recent years many hunters have come to rely on these birds. Now you can speak their own lanGauge Produces the ?tat-tat? sound of the drakes as well as the nasally quacks of hens. An easy duck call to blow. Specifications for Haydels Duck Gadwall Call: Manufacturer: Haydels Fabric/Material: Acrylic Species: Duck Package Contents: Haydels Duck Gadwall Call The Haydels GW01 Duck Gadwall Call is a quality addition to the Haydels lineup. For more great deals on Duck Calls by Haydels please browse our Haydels Hunting Gear page. Haydels Duck Gadwall Call GW01