Here two (three?) coyotes howl. It could be Big Gray in the foreground, hearing Miss Red in the distance (only her?). He goes toward the sound, disappears off-camera, and then we hear a second howl, very close....Is it Big Gray who has stopped to howl back (a likely exchange between a mated pair)? Or is a third coyote present?
https://www.youtube.com/watch?v=wFq5eWBezsE