Female Malard, anas pltyrhynchos
Mallard, anas pltyrhynchos
A male Mallard, you can clearly see the distinguishing little curled tail feather.
he does look like a cross between a Pacific Black and a Mallard.
The first photo is a favorite! What a funny expression. Looks like a cartoon character :DAs for the second photo I can never tell whether it's eclipse plumage, a cross or just a young in-between color changes. Very hard. + there are other domestic ducks that cross-breed with these too. Very hard to ID.
I know, I'm not entirely sure about these ducks. I would love to do a study on these birds social activities.