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Greater or Lesser Scaup


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February 29, 2020, up in Montana looking for and finding Snowy Owls (Yeah!) and enjoying Ft Peck dam and surrounding areas, I found a one of these things is not like the others, I think, in the river area east of the dam. Four of the ducks are Redheads. The duck at 9:00 is I believe a Scaup, it has the coloring though I'm not 100% sure it's not just the light and shading. The rounder head and lower posture made me think it was a Greater. It's "rare" but I haven't gotten anything from the reviewer one way or the other yet. I'm notoriously bad about Scaups, because most of what I see are Lesser. Thoughts?

Thank you!

 

2020%2002%2029%20Greater%20Scaup%20&%20R

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It's a scaup, certainly. However, identifying a scaup from a single, relatively poor photo is quite "dangerous." Is the bird or has the bird been diving? What does the head shape look like two seconds earlier or two seconds later? I would leave it unidentified, though I actually think that it's a Lesser. Greater Scaup is nearly the same size as Redhead, and this bird looks noticeably smaller.

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1 hour ago, Tony Leukering said:

It's a scaup, certainly. However, identifying a scaup from a single, relatively poor photo is quite "dangerous." Is the bird or has the bird been diving? What does the head shape look like two seconds earlier or two seconds later? I would leave it unidentified, though I actually think that it's a Lesser. Greater Scaup is nearly the same size as Redhead, and this bird looks noticeably smaller.

I think this is the proper way to look at this one just because of the fact that there is only one photo and it is not great quality, I would just leave it as greater/lesser scaup

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