Rich,
That is a great tip! Sounds really useful, better in certain situations than starting the stand with a howl. For instance, when I think I may stand a chance at calling a bobcat I never begin the stand with a howl, simply starting with low volume distress series. Beginning with the hawk whistle could be a neat way to drag those call shy coyotes into the stand without jeopardizing the chance of calling and not spooking a cat. Maybe if I think a howl could spook young coyotes and cause them to not respond readily for fear of being beaten up on by an old dog, this way could attract both old and young. Good tip.
Terry,
In my case because most often if I see a predator which is responding to the call, it'll certainly be within killing range, I call with the wind in my face and blowing behind me. Most likely when I can first see an approaching predator it'll be less than 100 yards. I always call with the wind in my face. I do this, and then try to make terrain work with me to funnel an approaching animal in my favor. If I can get the wind in my face and my back against a bluff or some similar terrain feature hopefully I can help keep the critter out in front. If I lived in an area that had fields and such, I'd have the field at my back and be facing into the cover to call (with wind in my face). This may cause a sneaky coyote to hesitate to circle and get your scent because he doesn't want to expose himself in the open without cover. A steep draw or gully can be used in much the same way. Saddles, points, spur ridge tops, side hill benches, clearcuts, all can help place a critter right where you want him. Sometimes!
You can use altitude the same way. Let the wind blow your scent on over the top of the ridge away from the cover you hope to get a critter out of. If all is right with the hunting gods that day, you'll be able to arrange all this and even have the sun at your back so the approaching animal has to come in squinting through the light!
I also most often hunt with my Dad and he's my back door man. Dad always covers the downwind side of the stand. Depending upon how thick the cover is, sometimes he'll be actually sitting against the back side of the same tree I'm leaning against, or as far out back as 100 yards. Over the years I've averaged around 65-70% of the kills and Dad has picked up the rest. Most of his kills if I were hunting alone would have gone untouched, probably unnoticed by me! Think about that now would ya!
You can also use your calling tempo to keep a hot trotter on the string. Normally, If I can see a coyote, it's time to shoot and quit calling. Yeah, I may lip squeak a time or two to pull him that last few yards into an open area or away from super heavy cover. I may also whistle or even bark like a dog to try and stop him from circling and getting my scent if I'm on him and know I'll have a good shot. However, if you don't have a shot and stop calling and the coyote quits on you and begins to get fidety, reduce volume and either lip squeak or keep right on calling. Sometimes you have to keep them interested or their natural curiosity and wariness will kick in and they'll want scent verification of the situation and begin to work around you.
This can also be the time for a motion DECOY. I use the Predator Supreme decoy after using just about everything else, including a homemade job I dubbed "FRANKENRABBIT." When the coyote sees the decoy they tend to get locked on that and are giving it at least half their attention. That's half off of you! Many times much more than half. I've had coyotes lock up like a champion bird dog on point at the sight of a decoy, this makes for a nice easy shot BTW. They also don't tend to notice a small bit of movement on your part if you set your decoy up right. I've had coyotes circle the decoy on it's downwind side trying to scent check it. I always try to put my decoy out upwind and out in front of me. When they circle in this way that puts them literally in your lap. I also spritz just a touch of cover scent around the decoy. Red fox urine, rabbit, squirrel, even deer cover scent. Anything the coyote may normally smell will be OK. It's just meant to hold their attention long enough for the shooter to do his job. BTW, don't spritz your decoy itself, you have to handle that thing and keep it somewhere around the house. A little squirt (not too much) on the downwind side of the brush or ground will suffice. I've also had a few coyotes rush the decoy and shooting them was in defense of property!
Another neat thing about the motion decoy is that crows, bluejays, woodpeckers, owls, and hawks will gather over it and add a touch of realism to the stand. Last winter I had a hawk attempt to snatch my Predator Supreme and make off with it!