Timberrunner and SK, right on. As a guy who's killed and cooked waterfowl numbering into 4 digits, I have thoughts on t'matter. 1st, depends on type of bird and what it likes to eat. A black duck on the coast feeding on marine invertebrates will taste much different from one just inland in freshwater feeding on corn and the like. Table quality of ducks/geese can range from inedible to damned delicious. Declaring all across the board to be unfit for consumption is, to me, similar to taking Sal's ubiquitous long-arming fish pics as reality. If you've never had properly prepared, plump wild duck served up for dinner, you're not entitled to an opinion. YMMV.
