Serious question

Personally, I think the number of ducks out there is way lower than they are telling us. Everywhere you read, on all of these web sites all say the same thing.No ducks! If there is a big decrease in the numbers,because the harvest has been declining almost yearly, what happened? Just to throw this out there what about today's agricultural practices specifically : corn. We all know that no mallard alive can resist a flooded corn field or one with lots of waste corn but today's corn isn't the same corn your grand pappy grew. Now everything is genetically modified and Round Up ready and I don't think they spare the insecticide. What do you guys think? Are the ducks in trouble? Just wondering on this duckless Pa. Day....