Scaup or tufted, central Scotland (1 Viewer)

[Dawsy]

I'm guessing this is just one of those female tufties with a lot of white around the bill but could it be a scaup and can we be sure from the poor pictures?
As I see it the pro-scaup features are: no hint of a tuft from any angle, back looked greyer than nearby female tufties.
Pro-tuftie: one image looks like a broad black bill-tip but I'm not sure that's not just shadow, not obviously bigger than nearby tufties.
Seen today at Bothkennar pools, Falkirk, Central Scotland

Michael

 

[Markus0803]

i would say tufted

 

[Joern Lehmhus]

I would say this looks quite good for scaup to me , bill tip in females can be with more black, as that exmple from Flickr shows:

https://flic.kr/p/mFgfou

however it is difficult to be 100% sure its not a hybrid with these photos . pure Tuftie can be exclueded due to the grey back.

 

[Nutcracker]

Do the white under-tail coverts (pic #1) show anything? Would think that would count against pure Scaup?

 

[Dawsy]

Thanks, I'll have to go back and see if I can see it better.
Michael

 

[Joern Lehmhus]

there`'s so much light on those, also on the flanks on some photos , that ist difficult to say how pale they really are . there will be greyish vermiculated feathers there in scaup , see previously linked photo

 

[Bismarck Honeyeater]

Scaup