This is obviously a male Northern Shoveler,
but I’ve never seen one that looks like this before. Somebody, or something, has really managed to ruffle its feathers. The head lacks the green sheen I’d expect to see, particularly in such bright light. If it weren’t for the bill I might have had a hard time identifying it at all. I’m guessing this must be transitioning from its Eclipse Plumage to its breeding plumage.