Woodhaven custom calls the real hawk hand tuned birch FEATURES:-Hand turned of the finest birch to produce the perfect high-pitched sound that really stirs up the woods.-Makes woodpeckers, crows, blue jays, other hawks & most of all gobblers sound off Other Features: It will make gobblers sound off more than most turkey hunters realize, hand tuned w/ the finest birch to produce perfect high pitch sound makes woodpeckers, crows, blue jays, other hawks and most of all, gobblers sound off! won't swell or shrink in moist conditions