This forum is for asking questions and providing answers on bird identification. New and visiting birders are encouraged to ask and participate.
#88479
The one with the faint green patch behind the eye is an American Wigeon. It appears that the duck at the back of the first photo is a male American wigeon and the one at the front is a female American wigeon. The two ducks with the distinct large green patches in the last photo you posted are male American Wigeons as you suggest.
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