Since I did not thank you baby my ducklings I truly do not know the age of them I am guessing we are about 8 to 10 weeks old. It really doesn't matter to me whether I have a Drake or Hen, but it's fascinating to me that they have never been around A mother duck and they look at me as their mother or father and they automatically know the sounds of their predators/danger. I have one who has a yellow beak and it's getting dark down the middle and the other one looks green with a tiny bit of yellow can anyone help me with determining their sex?