Female Lesser Scaup
Their head is brown, not purple like the males, and they have a patch of white above their beak, which the male does not. Brown body rather than the black and white of the male.
Female Lesser Scaup (Aythya affinis)
Aythya affinislesser scaupmale lesser scaupduckaquatic birdwater fowlpondflower mound texasa pond in rheudasil parkaquaticdiving birdclose up