I'll have to go right along with TRKYKLR on the diaphram and suction calls . I haven't seen the whistle he mentioned .
But I can say from experience that if all else fails for you , the H.S.STRUT HAWK WHISTLE is as simple a call to use . Instead of the quick blast of air that makes the hawks whistle , blow very , very gently . I also stick my index finger into the call from the front and close off MOST of the opening . Only trouble with this call is it won't make the KEE KEE RUN . But I'd bet some of you could have the mouthcall in and ready for that .
I've used the Primos Limb Hanger , Diamond yelper , and Double Howler coyote diaphrams . But these I could not make the soft kee kee with . The wingbone and the hawk whistle can be run ever so softly .
I've told this before ,,,,I was in the vicinity of a brood flock last fall , just prior to season . They were scattered around raking the woods at somewhere between 60 and 100 yards . I was dressed for squirrel hunting . Now I suppose that most everyone can make that faint whistle where you use the tip of your tongue against the roof of your mouth and blow air gently . Also these birds were making quite a bit of racket in the leaves and sparring and some calling . I made the faintest and most pathetic KEE KEE with that faint whistle . If you had been with me and standing 30 yards away I doubt you could have heard it . In less than a minute I had a good number of jakes inside 20 yards and stretching their necks trying to see into the weeds where I was sitting on the ground . I didn't offer any more calls and they all ran back to the flock . Their hearing is phenominal to say the least.
There is more than one way to skin a cat ,,,,,,,,,,,ain't there ?