I was reading somewhere that if you stick a black flag on a pole and wave it around that you can get more ducks kind of like flagging for geese. Has anybody heard this?

nope

We use flags like these ones when diver hunting.. they work great!

I have a duck flag. It is the same as a goose flag, just smaller and has white on the bottom. I plan on using it in some of the flooded fields I hunt.

have used black flags like the ones swamp uses .... and as he stated ... for divers ... and they work great to get their attention ...then the dekes take over

i don't flag...i hit the Mojo.... in Nj.....lol