Photos: 9
Forms: 7 (F, F/Breeding, F/Non-breeding, M, M/Breeding, M/Domestic, M/Non-breeding)
Domestic type
CA-BCCZ-PRES-MDIS-1US-AKUS-AZUS-DCUS-DEUS-IAUS-ILUS-MDUS-VA
0ISSF.
Plumage varies, female consistent but male in non-breeding (JUN-SEP) looks like female but with (some) green on head still.
M/F differ, with males perhaps being the most identifiable duck in most areas.