So, there has been a certain duck at the park lately and I just can't figure out what it is. He is at least six months old, he is definitely larger than every mallard there, his head is almost a little more turquoise than the others, and his beak is more gray/blue-ish (not yellow like the mallard in the first picture). He arrived one day with a male pekin. I guess someone dropped both of them off but they do everything together. I figure maybe because he was with a pekin, he might be part pekin, but I can't tell by looking at him. Does anyone have any possible idea? Thanks a lot.