I absolutely LOVE Coyotes. They are probably my most favorite target in the whole world. However they are not the easiest critter to call though. Everytime I think I get a Coyote figured out, the Coyote teaches me something I didn't know.
I started with Mouth Calls and wasn't having too much success. I figured it had to be me, so I set out to get an Electronic Caller. Being the tight wad I am I set out to build one, which I did. In fact I have built several over the past dozen or so years.
The Home Made E-Caller
The above link has some different ones I have built as well as quite a few from other guys that modified the design to suit their own needs.
In my quest to build the best Electronic Caller I discovered something along the way. I still wasn't calling Coyotes and it was not the sounds I was producing that was the problems, but rather some things I wasn't doing and other things I was doing wrong.
In the end I have pretty much went back to mouth calls. I have a few favorites after trying more than I care to admit to. The one thing about mouth calls is that the ones that I can blow the best and produce the best sounds with, may not work at all for someone else. We all blow a call differently.
Mouth Calls I have had good success with are as follows:
One favorite is the Sceery AP-3 Jackrabbit Call. This is a closed reed predator call with a raspy sound and is super easy to blow. I have probably had the best results with this call of any I have used. However it really cold weather this particular closed reed call does freeze up easily.
I also have and use the Lohman / Circe 3 way adjustable closed reed predator call previously mentioned by another poster. I have had some success with this call as well and it does not seem to freeze up as easily as the Sceery AP-3.
I have sort of replaced my Sceery AP-3 with the Sceery AP-7 Open Reed Predator Call. it takes more practice to get proficient with an Open Reed Call, but once mastered they are capable of producing more and different sounds than a typical closed reed call. In a pinch the Sceery AP-7 makes a decent howler as well.
I also like the Crit'R'Call Song Dog (for both distress sounds and howling) as well as the Crit'R'Call Mini Open Reed Predator (again for both distress sounds and howling). I have a Crit'R'Call Mini Open Reed Predator that I have mounted in a Megaphone (a plastic transmission funnel cut down to the size that produced the best sound to suit my needs) for my main howling caller. The megaphone totally changed the volume and tone of this call and it is probably the easiest to blow howler I have ever used.
I also have a WoodsWise Open Reed Female Howler that I use with a megaphone attach for howling (a plastic transmission funnel cut down to the size that produced the best sound to suit my needs). On this one I made a different reed out of bulk reed material I picked up from Rocky Mountain Wildlife Products (Crit'R'Call).
I have tried the Tally Ho Open Reed Predator Call on several occasions and I never have been able to blow this call like it should be blown and have kind of given up on it.
The very first predator call I ever used was an old Scotch Bellows Style Predator Call. I had some success with this call but feel it requires too much movement to be totally effective unless the stand selection is perfect.
Lastly a MUST HAVE is a mouse squeaker. I have used the Scotch Bulb Type Mouse Squeaker but found that the material they are made of doesn't stand up in cold weather and all of the ones I have had eventually cracked. I am now using an oval shaped (can't remember the name of it) Mouse Squeaker that has stood the test for a couple years now. The one I am currently using is made of a white material for the squeaker that is surrounded with black rubber that has a loop on one side of it for a holder. Of the 5 Coyotes I have called in and taken this fall, all but 1 were called in with nothing more than the Mouse Squeaker.
I have one of these Mouse Squeakers and a Crit'R'Call Mini Open Reed Predator on a lanyard in every vehicle I ever drive so I always have calls with me.
Larry