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I saw this duck at the Temsco Pond in Juneau, Alaska at 7:00 am on May 22, 2019.  I believe it is a lesser/greater scaup.  What has me a bit confused is the blue-grey and rose colored bill.  I can't seem to find any information or images of scaups with this bill coloration.  Any info or comments would be appreciated.  Thank you.

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13 hours ago, Jefferson Shank said:

Yea, that's what I thought at first too. But look at that strong green color on the last picture and the massive bill.

You can't reliably use head sheen, I think.

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First, except for the base of the bill, it's not got anything in it that's apparently from a putative Rosy-bill parent, as the plumage is fine for either scaup and most features are wrong for a Rosy-bill. I think that the jury is out on which species of scaup. The bill nail seems almost intermediate in the one good view of it. It's not parallel-sided, but it's not off that by much. If anything, it's more GRSC-like than LESC-like, but I don't trust it.

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On 2/19/2021 at 12:59 PM, Seanbirds said:

Why does this look like a Rosy-billed Pochard x Scaup hybrid?!?

 

On 2/19/2021 at 6:25 PM, Tony Leukering said:

First, except for the base of the bill, it's not got anything in it that's apparently from a putative Rosy-bill parent, as the plumage is fine for either scaup and most features are wrong for a Rosy-bill. I think that the jury is out on which species of scaup. The bill nail seems almost intermediate in the one good view of it. It's not parallel-sided, but it's not off that by much. If anything, it's more GRSC-like than LESC-like, but I don't trust it.

Sorry, I didn’t mean that for real, It just really reminded me of one.

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