Gray Call Ducks

[KansasKid]

Quote:
Ducks can sort of go though menopause - the hormones change, they'll stop laying eggs, and sometimes they'll develop full-on male plumage, drake curl and all. But, they're still female.

That would be weird-

 

[Scott]

Quote:
Yes, similar. With the green plumage in the hen... it is hormonal with age. With the white ring... some young hens (of the mallard/grey variety) have that as well.