I consider myself a "tree guy" and in my time in the field (primarily in western and central NY) I haven't come across such a species.

Thanks to everyone for jumping in on the double bit axe question. The "two edges for two purposes" story is one that I have used in the past and I'm gald to see that it was true for at least some folks out there. I'm putting on a demonstration in March and now I'll be able to cite references!