So those of you with adult ducks...do the males have more iridescence on the head than the females? I have been watching for curly tail feathers - none so far, we are 13-14 weeks. My friend has one that is 2-3 weeks older and he has the curly tail feather. I also noticed that while both have the blue sheen on the wings, hers has a much shinier head. Gender thing or age thing or of no importance? I can't go by quacks...my Pekin out-noises everything.