Matthew touches on one of the most enjoyable aspects of collecting 'hunters'. Since almost every maker, every collector, every user (hunter or no) has his own idea of what an ideal small fized blade should be like, there is almost endless variety of designs that fit the 'hunter' category.
I usually think of a knife with a 2.5 to 5 inch fixed blade and a guard as a hunter. But I have several puuko inspired knives without guards that I also consider part of my hunter collection. All of my custom fixed blades are hunters. Even my three custom folders fit that description as well.
A Hunter is usually similar or synonymous with Utility knife. Variations in blade length, blade grind, belly, and the point position (drop, straight, or upswept) usually influence when a knife is called a skinner, hunter, bird and trout, or utility knife. Every maker that I know of produces small fixed blade hunters. They are all quite different. But they are all the same thing to me.
On a hunter you can usually you can expect a guard, but not always. And the absence of a guard does not make a knife a Puukko. But I think a Puukko can certainly be called a 'hunter'. You can no more exactly define the term 'hunter' than you can Fighter, or Bowie, Art Knife, or Custom. The beauty is in the eye of the beholder and what word he uses to describe a small fixed blade is a personal choice. But I think most of us know what is meant when someone calls a knife a hunter.
Para