Funny that this post comes up again because I did a little research which may not mean a thing but here goes.
I popped in the first Predatorquest video and then made sure my guitar was in tune and then sat there and listened, found the note he is blowing on my guitar, and compared and to my ear, Les is not always blowing a C note but does dance around it a lot. Sometimes a bit sharp(above it) or flat(below it) but real close most of the time.
Now if C(high, low or middle) was the magic note that made coyotes come in and that is all a guy blew, you would want to blow a call so as that you stayed on C all the time, BUT, you would have very monotone calling(talking just sqalling here not howling). It would be one single note(like a car horn-it never changes pitch)...the only thing you could change would be the length and volume but never the pitch but it might be similar to a fawn bleat maybe? I think he mentions deer/antelope bleats in that DVD and does say that where you find antelope herds, you will find coyotes. Kinda makes a guy think, No?
Is it this simple? Just find a herd of antelope and blow a very monotone note as close to C as you can get and watch them(coyotes) come Les Johnson style(5 on one stand). Hell, I dont know. I think I am imagining things now.
Anyway, enough of my ramblings but If you guys want, take a think on this and post any ideas.
Thanks,
Jaybic
Ps.