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mallard x american black duck?

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43 minutes ago, akiley said:

I agree on hybrid for this but I have a general question. Can pure ABDU have any white in the tail?

Not truly white. When worn, ABDU tails can show pale outer webs that from the side make the tail look white or whitish. The same is true for Mottled Duck. A confounding factor is that first-cycle birds are still wearing their juvenile tails in winter, and, by now, are getting quite worn/bleached. Were it not for the apparent green in the head of this bird, I would have been more circumspect about the apparent white in the bird's tail.

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