I can't tell the gender of my 7 week old mallard/rouen by quack. Does the green head come in with the first set of feathers come in? I am really hoping for a hen.
I usually see the males' head start to turn green at about 13 to 14 weeks old. But, you should be able to tell before then. Most of the ones that I've seen at 7 or 8 weeks have yellow bills and are starting to get a raspy quack.
I have 3 of mine that have green sheen to their heads and they are 4+/- weeks old....I cant seem to figure out their quacks/chirps yet...Ive been listening alot and its a hard talent to master!!!!!
Female mallards start quacking at the 5 or 6 weeks old, their beck don't change the colour but the males beck turns to yellow. With 3 months it's completly yellow and with 4 months they hace their adult plumage.
Thanks