ECHO CALLS INC Timber Duck Acrylic Dark Green Single Reed. These are high performance calls that produce a wide range of tones from loud hail calls to soft raspy quacks. This call was designed specifically for close in calling which works great for finishing and getting ducks to commit to the decoy spread. Specifications for ECHO CALLS INC 77766 Timber Duck Acrylic Dark Green Single Reed: Manufacturer: Echo Calls Color: Dark Green Fabric/Material: Acrylic Species: Duck ECHO CALLS INC 77766 Timber Duck Acrylic Dark Green Single Reed