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2 Sterna for ID

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Old Tuesday 15th August 2017, 18:10   #1
Miguel Berkemeier
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2 Sterna for ID

Portugal - 15/08/2017
2 photos of each bird, two different birds
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Old Tuesday 15th August 2017, 18:12   #2
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Both Sandwich Terns Thalasseus sandvicensis for me
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Old Tuesday 15th August 2017, 18:21   #3
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Ahh ok, thanks! But juveniles? I can't see the yellow part of the bill
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Old Tuesday 15th August 2017, 18:27   #4
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And the bill of the second bird seems a little robust, but it should be only my impression
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Old Tuesday 15th August 2017, 18:33   #5
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Yep, I reckon the first is a juv / 1st-winter, the second perhaps a one-year old bird? (not sure, it seems to show a mix of adult and juv characters). But even on adults, the yellow tip can often be hard to see on blurry pics (and in life on distant birds) - it gets burnt out and vanishes, which also has the effect of making the bill look shorter and stouter than it actually is.
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Old Tuesday 15th August 2017, 23:34   #6
Miguel Berkemeier
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Quote:
Originally Posted by Nutcracker View Post
Yep, I reckon the first is a juv / 1st-winter, the second perhaps a one-year old bird? (not sure, it seems to show a mix of adult and juv characters). But even on adults, the yellow tip can often be hard to see on blurry pics (and in life on distant birds) - it gets burnt out and vanishes, which also has the effect of making the bill look shorter and stouter than it actually is.
Thanks a lot!!
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