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Stercorarius pomarinus ? norway

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Old Monday 15th July 2019, 11:29   #1
juancar dieguez
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Stercorarius pomarinus ? norway

hello, this foto is in North Norway, in Lofoten last week
can be pomarino ?

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Old Monday 15th July 2019, 11:49   #2
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Dark morph parasiticus for me Juancar.
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Old Monday 15th July 2019, 11:57   #3
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Dark morph parasiticus for me Juancar.


thanks
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Old Tuesday 16th July 2019, 05:30   #4
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The proportions of the bird look very slim to me and the White primary flashes are restricted to the outer 2 primaries - why not intermediate Long-tailed?

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Old Tuesday 16th July 2019, 09:58   #5
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Originally Posted by rollingthunder View Post
The proportions of the bird look very slim to me and the White primary flashes are restricted to the outer 2 primaries - why not intermediate Long-tailed?

Laurie
....and the bill does look on the short side?

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Old Tuesday 16th July 2019, 10:29   #6
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....and the bill does look on the short side?

Cheers
True, perhaps I’ve been living in the mountains too long to offer suggestions on skuas................................................gulls, waders, wildfowl etc etc
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Old Tuesday 16th July 2019, 10:44   #7
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but LTS dark morph is about the rarest bird in the world isn't it? And I thought 2 outer primaries only white shaft is on the upperwing?
This said I know about skuas as much as i know about gulls, happy to be corrected
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Old Tuesday 16th July 2019, 10:49   #8
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I photographed very similar looking bird (maybe even the same bird) at 2nd July in Ĺ i Lofoten, Norway.
I wonder long time what this might be and finally I decided it is parasiticus, but I'm not 100% sure. What do you think?
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Old Tuesday 16th July 2019, 12:21   #9
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either OB and those in the images #8 are dark arctic skua. no way long-tailed.
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Old Tuesday 16th July 2019, 13:58   #10
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I have seen 2 different dark LTS from the Scillonian - i don’t know as to how rare the morph is.

The original image lacks ‘chunky’ proportions to my eyes altho the ‘pot belly’ is not visible...

Laurie -
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Old Tuesday 16th July 2019, 14:31   #11
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Quote:
Originally Posted by rollingthunder View Post
I have seen 2 different dark LTS from the Scillonian - i don’t know as to how rare the morph is.

The original image lacks ‘chunky’ proportions to my eyes altho the ‘pot belly’ is not visible...

Laurie -
https://www.birdguides.com/articles/...a-in-shetland/
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Old Wednesday 17th July 2019, 08:09   #12
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Cheers Tom

I remember that article and the beautiful pictures that are shown with it.

I spoke to a friend last night who has made several visits to Varanger photographing amongst other things Long-tailed Skuas during the breeding season. He says that on his trips he has encountered upper single figures on the breeding grounds including 2 instances of both adults being dark. This morph must be uncommon or perhaps mistaken for Arctic during Autumn passage. I wouldn’t know just conjecture...

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Old Wednesday 17th July 2019, 09:52   #13
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Cheers Tom

I remember that article and the beautiful pictures that are shown with it.

I spoke to a friend last night who has made several visits to Varanger photographing amongst other things Long-tailed Skuas during the breeding season. He says that on his trips he has encountered upper single figures on the breeding grounds including 2 instances of both adults being dark. This morph must be uncommon or perhaps mistaken for Arctic during Autumn passage. I wouldn’t know just conjecture...

Laurie -
thanks for that
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Old Thursday 18th July 2019, 12:55   #14
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Quote:
Originally Posted by lou salomon View Post
either OB and those in the images #8 are dark arctic skua. no way long-tailed.
Thank you for this.
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Old Thursday 18th July 2019, 13:04   #15
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Original bird is Arctic Skua. As are those in post 8.

Dark morph *ADULT* LTS are very rare (3-4 documented records ever, worldwide), and unlikely to be over-looked on passage. If someone was photographing them in Varanger (where all the LTS I've seen were pale-morph adults), then it would be nice to see some photos. Dark morph *immatures* are much more common.
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Old Thursday 18th July 2019, 13:40   #16
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Originally Posted by GWB77 View Post
Original bird is Arctic Skua. As are those in post 8.

Dark morph *ADULT* LTS are very rare (3-4 documented records ever, worldwide), and unlikely to be over-looked on passage. If someone was photographing them in Varanger (where all the LTS I've seen were pale-morph adults), then it would be nice to see some photos. Dark morph *immatures* are much more common.
which takes us back to published scientific evidence, thanks even more
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Old Thursday 18th July 2019, 14:55   #17
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Quote:
Originally Posted by GWB77 View Post
Original bird is Arctic Skua. As are those in post 8.

Dark morph *ADULT* LTS are very rare (3-4 documented records ever, worldwide), and unlikely to be over-looked on passage. If someone was photographing them in Varanger (where all the LTS I've seen were pale-morph adults), then it would be nice to see some photos. Dark morph *immatures* are much more common.
Interesting, had no idea that young, dark birds don't stay dark and that adult dark are so rare.
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Old Thursday 18th July 2019, 18:27   #18
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Tongue in cheek: does this mean that dark morph immatures really should be described as dark phase?

Niels
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Old Thursday 18th July 2019, 19:40   #19
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Tongue in cheek: does this mean that dark morph immatures really should be described as dark phase?

Niels
I guess dark phase should be good as they will become light adults and morph would be wrong
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Old Friday 19th July 2019, 03:39   #20
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All very interesting - my mate unfortunately does not take photographs except for mobile phone views and nest records - his visits were for the purpose of breeding census - perhaps he was looking at either immature birds or distant Arctics?

Either way i will update him on the info given here

At the risk of playing Devils Advocate the species is classified as ‘of least concern’ with the 2 subspecies having a combined population of a minumum of 250k - 750k over a potential breeding area of nearly 35 million hectares. Common sense would tell me that there must be dark birds unseen or recorded away from the more easily visited hotspots in Norway or Arctic Canada...

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Old Friday 19th July 2019, 06:47   #21
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Tongue in cheek: does this mean that dark morph immatures really should be described as dark phase?

Niels
That would actually be the correct term in this case Niels!
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Old Friday 19th July 2019, 06:49   #22
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I guess dark phase should be good as they will become light adults and morph would be wrong
Morph is always wrong IMO, that implies that something can change at will, form is a far better word, again, IMHO.
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Old Friday 19th July 2019, 06:56   #23
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Morph is always wrong IMO, that implies that something can change at will, form is a far better word, again, IMHO.
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Old Friday 19th July 2019, 07:10   #24
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I prefer morph but it is a bit ambiguous as it is from the Greek ‘to transform, change shape’ which it doesn’t and it is also not a ‘phase’ i.e. a period of transition. In zoological terms it better suits insects with a complete life cycle, not instars and probably other species and organsms...

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Old Friday 19th July 2019, 12:30   #25
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