I have recently killed one of a pair of responding coyotes on three different occasions and within minutes the coyote that escaped let out a single howl that is shorter than an interrogation/invitation but longer than the challenge/warning and had very little change in tone or inflection, kind of deeper than most howls. Twice the male met his maker and once the female, I presume the exiting coyote was of the opposite sex but could not be certain. Anybody else experienced this?