This reminds me of a joke

Two rednecks decide to go duck hunting together. So, they go to a pond, but since they're in Texas in the middle of a dry spell, the pond doesn't have any water in it. One of the rednecks says "Y'know, Earl, ducks ain't that smart. I bet if we spread a blue tarp over the pond, the ducks'll think it's water and come land on it!" Earl thinks this is a good idea and gets the tarp from his pick-up. They spread the tarp out, hide behind some reeds and wait for the ducks. Two ducks show up and fly down for a landing. Just before they get into rifle range, the ducks start laughing and fly off. Two more ducks show up, but before they get close enough, they fly away laughing. After this happens a third time, Earl says "Bubba, why don't you go out there and see what those ducks think is so damn funny?" Bubba comes out of the reeds for a better look. He comes back laughing. Earl asks "What was so funny?""Two Aggies are out there trying to fish!"