Opening and closing the hole in the exhaust barrel allows the caller to sound like two different Mallards. Closed for older hen open for higher pitch of younger hen.
Haydel s Game Calls H-81 Canada Honker Goose Waterfowl Call
Original price was: $34.58.$27.89Current price is: $27.89. 
Zink Calls PH-1 Power Hen Single Reed Duck Mallard Call, Gun Smoke
Original price was: $25.99.$23.39Current price is: $23.39. 
Haydels VTM90 Duck Variable Tone Mallard Call
Original price was: $43.25.$32.20Current price is: $32.20.
Additional information
| Brand | Haydel's Game Call |
|---|---|
| Merchant | Walmart – sporting goods |