Wait so now ducks can count?!? Shoot I better rethink how I duck hunt. Ducks don't care about number of ducks using a spot. How many times have you seen a duck land in a spot with 1, 10 or even 0 ducks in it? All the freaking time is the answer. One of the lakes I hunt is right by a major road and about 5 years ago I had a buddy drive by and he could see my spread from the road that was about a half mile away. Just a few hundreds yards away was another hunter. I only had a dozen goose floaters and handful of magnum duck floaters the guy next to me had a boat load of duck decoys. Why did my buddy see my decoys and not the other? Because in open water magnum decoys sit higher on the water and are more visible. You can spread your 150 decoys anywhere you want but if they can't be seen past the waves and back drop they aren't helping at all. This is for open water and If I'm on a pond of course I'm using the standard decoys and probably teal decoys. This is because I can spread them out and make more dots on the water surface. But in this situation I'm only using 12-24 decoys not big numbers.