How common are black bellied whistling (or tree) ducks in your area. They are getting very common in SW AR. In fact, they probably rival wood ducks in numbers this time of year (in places). They really thin out in during duck season, but I have killed a few each of the last two seasons. I can not even find them listed in the waterfowl regs, so I am assuming you can kill six? Anyone know if there is a different limit on them?