Well, a guy would be best off with a howler that can give all coyote vocalizations, male and female. The female/young male vocalizations are basically the same. They are a higher pitch than what a dominant male would sound like. You'd be less likely to scare off less dominant coyotes with the higher pitched sounds, and the more dominant male will respond to the younger male/female sounds too. There are times when a guy needs the old dog sounds, for instance, when calling and trying to imitate a pair of coyotes, or if you're calling and a dominant male responds by howling at you, you can then use a challenge howl in the lower pitch, to challenge the old coyote, which may get him to respond. If I had to choose between male and female sounds, I'd go with a howler that gives good female vocalizations. Why? Mainly because by using female howls, you're less likely to scare off the less dominant coyotes and there are more situations where I want to sound like a lesser male or a female. There is nothing like having a "conversation" with a coyote/coyotes and then getting them to come to you after words. I use my howlers very little in the early season, but come late Jan., Feb., and early March, they are almost all I use. It's like an "ace in the hole" for late season calling. There are several different coyote vocalizations, the more you can master, the more action howling will bring ya. Good Luck!!