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Divers sp. (?)

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Old Friday 12th December 2014, 15:05   #1
osprey0311
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Divers sp. (?)

Hello!
Help, oplease, with ID:
(Ukraine, today)
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Old Friday 12th December 2014, 15:12   #2
Andrew Whitehouse
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Black-throated Divers
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Old Friday 12th December 2014, 15:22   #3
chris butterworth
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Old Saturday 13th December 2014, 09:00   #4
osprey0311
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Thanks to all!!!)
How about this one? Juvenile Red-throated Diver?
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Old Saturday 13th December 2014, 09:02   #5
lou salomon
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yes, 1cy RTD.
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Old Sunday 14th December 2014, 06:45   #6
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For my personal interest, how is great northern separated from these pictures, especially the one in the back? (regarding the original 2 birds not the RTD)
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Old Sunday 14th December 2014, 11:52   #7
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Originally Posted by Silverwolf View Post
For my personal interest, how is great northern separated from these pictures, especially the one in the back? (regarding the original 2 birds not the RTD)
Upper and lower culmen are more curved, leading to a point whilst GND has a more angular bill. The rear white thigh patch is also a useful indicator for BTD, whilst GND does show white flanks when sitting high in the water they don't arc upwards at the end to create a bulge of white near the rear. Neck pattern is probably my favourite separating feature. BTD shows a grey nape which darkens at the sides as it approaches the the sudden contrast to a white throat. On the other hand, juv and winter plum. GNDs have a pale wedge in the side of the darker nape. The nape is also darkest at the rear, not the sides as is the case for BTD.
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