If you don't receive a vocal answer, please do not dispair. Coyotes in my own area do not often howl in daytime, but will still come to the howls. What I like to do after giving them two or three lonesome sounding howls is to wait in silence for a few minutes and then give them my favorite distress screams. This could be a rabbit, bird distress or what ever. My howler is tuned to reproduce good puppy dog squeals, so I often just use those. pup whine I then wait in silence for a few more minutes. If nothing shows up, I repeat the sequence.
Sorry...wavs will work now....Bob/SoCal