In case you were wondering about a duck's male anatomy, we've got you covered. When male ducks are around a lot the size of their junk will change and get larger in order to give them a better chance to mate. It's not all great news for the male duck. It seems that after the mating season ends, the ducks' private member shrinks again to its original size. Your welcome.
Here's what happens according to POPULAR SCIENCE:CLICK HERE