GullDK: Larus glaucoides kumlieni?

Showing posts with label Larus glaucoides kumlieni?. Show all posts

Wednesday, 9 July 2014

Possible Kumlien's Gull (Larus [glaucoides] kumlieni), 4cy, 28.01.2012, Thorsminde Harbour

Case: 2013-164
Date: 2012-01-28
Site: Thorsminde Harbour, Denmark
Observer: *Allan Kjær Villesen, Jørgen Nissen

From these photos alone it seems not safe to exclude a well-marked Iceland Gull (Larus glaucoides) though this is not to say it is not Kumlien's Gulls. It has without doubt some dark pigmentation along the tip of the outer primaries, but as photos of the open wing are missing it is not possible to determine whether is has a clear Kumlien's/Thayer's pattern on the outer primaries. Note that it is not abnormal for 2nd- and, especially, 3rd-cycle glaucoides to show a brown wash on the outer primaries. The plumage of such well-marked immature gulls often looks quite retarded, with still lots of brown in the wing. Note that the brown wash on outer primaries of such birds simply matches the brown wash on outer secondaries, as is often the case in other 3rd-cycle gulls (e.g. Herring Gull). It is therefore considered just to be a trait of immature plumage.

Date: 28.1.2012. Foto: Allan Kjær Villesen

Date: 28.1.2012. Foto: Jørgen Nissen

Tuesday, 8 July 2014

Possible Kumlien's Gull (Larus [glaucoides] kumlieni), 4cy, 15-16.01.2012, Blåvandshuk, Blåvand

Case: 2013-165
Date: 2012-01-15 -(01-16)
Site: Blåvandshuk, Denmark
Observer: *Henrik Knudsen, Klaus Malling Olsen, Per Poulsen, Freddy S. Hansen m.fl.

From these photos alone it seems not safe to exclude a well-marked Iceland Gull (Larus glaucoides) though this is not to say it is not Kumlien's Gulls. It has without doubt some faint pigmentation along the tip of the outer primaries, but the flight shots do not seem to show a clear Kumlien's/Thayer's pattern on the outer primaries. Note that it is not abnormal for 2nd- and, especially, 3rd-cycle glaucoides to show a brown wash on the outer primaries. The plumage of such well-marked immature gulls often looks quite retarded, with still lots of brown in the wing. Note that the brown wash on outer primaries of such birds simply matches the brown wash on outer secondaries, as is often the case in other 3rd-cycle gulls (e.g. Herring Gull). It is therefore considered just to be a trait of immature plumage.

Date: 15.1.2012. Foto: Henrik Knudsen

Date: 15.1.2012. Foto: Klaus Malling Olsen

Date: 16.1.2012. Foto: Per Poulsen

Possible Kumlien's Gull (Larus [glaucoides] kumlieni), 4cy, 03.02.2012, Aabenraa Harbour

Case: 2013-167 (also 2013-163)
Date: 2012-02-03
Site: Aabenraa Harbour, Denmark
Observer: *Clemens Portofeé, Martin Gottschling

From these photos alone it seems not safe to exclude a well-marked Iceland Gull (Larus glaucoides) though this is not to say it is not Kumlien's Gulls. It has without doubt some faint pigmentation along the tip of the outer primaries; however, the flight shots do not seem to show a clear Kumlien's/Thayer's pattern on the outer primaries. Note that it is not abnormal for 2nd- and, especially, 3rd-cycle glaucoides to show a brown wash on the outer primaries. The plumage of such well-marked immature gulls often looks quite retarded, with still lots of brown in the wing. Note that the brown wash on outer primaries of such birds simply matches the brown wash on outer secondaries, as is often the case in other 3rd-cycle gulls (e.g. Herring Gull). It is therefore considered just to be a trait of immature plumage.

Date: 3.2.2012. Foto: Martin Gottschling

Possible Kumlien's Gull (Larus [glaucoides] kumlieni), 4cy, 13.01.2012, Blåvandshuk, Blåvand

Case: 2013-174
Date: 2012-01-13
Site: Blåvandhuk, Denmark
Observer: *Henrik Böhmer, Henrik Knudsen m.fl.

From these photos alone it seems not safe to exclude a well-marked Iceland Gull (Larus glaucoides) though this is not to say it is not Kumlien's Gulls. It has without doubt some faint pigmentation along the tip of the outer primaries, but the flight shots do not seem to show a clear Kumlien's/Thayer's pattern on the outer primaries. Note that it is not abnormal for 2nd- and, especially, 3rd-cycle glaucoides to show a brown wash on the outer primaries. The plumage of such well-marked immature gulls often looks quite retarded, with still lots of brown in the wing. Note that the brown wash on outer primaries of such birds simply matches the brown wash on outer secondaries, as is often the case in other 3rd-cycle gulls (e.g. Herring Gull). It is therefore considered just to be a trait of immature plumage.

Date: 13.1.2012. Foto: Henrik Böhmer

Date: 13.1.2012. Foto: Henrik Knudsen

Date: 13.1.2012. Foto: Henrik Böhmer

Tuesday, 21 February 2012

Iceland Gull (Larus glaucoides), 4cy, 5.2.2012, Hirtshals Harbour #4

This is the sixth of eight white-winged gulls found in Hirtshals Harbour in just one afternoon, with seven Kumlien's /Iceland Gull-types and one 2cy Glaucous Gull.

It is considered to be an Iceland Gull though this is not to say it is not Kumlien's Gulls. It has without doubt some rather dark peppered eyes, distinct pigmentation along the tip of the outer primaries and the pearl grey colour on the inner web is intensified in colour towards the tip of the outer primaries thus creating the impression of “a string of pearls” which is good for Kumlien’s. Other photos of the same individual were taken on January 21 and Februar 25.

The primary pattern is just about identical to this and this from Hirtshals and this from Hanstholm. The latter has been identified as a Kumlien's Gull by local people due to the faint dark pigmentation along the very tip of the outer primaries.

25.2.2012. Foto: Klaus Malling Olsen

Tilføj 21.1.2012. Foto: Rune Sø Neergaard

Iceland Gull (Larus glaucoides), 4cy+, 5.2.2012, Hirtshals Harbour #3

This is the fifth of eight white-winged gulls found in Hirtshals Harbour in just one afternoon, with seven Kumlien's /Iceland Gull-types and one 2cy Glaucous Gull.

It is considered to be an Iceland Gull though this is not to say it is not Kumlien's Gulls. It has without doubt some rather dark peppered eyes, faint pigmentation along the tip of the outer primaries and a few photos even gives the impression of a faint version of “a string of pearls” which is good for Kumlien’s. Another photo taken on January 21 of what is believed to be the same individual can be seen here.

The primary pattern is just about identical to this and this from Hirtshals and this from Hanstholm. The latter has been identified as a Kumlien's Gull by local people due to the faint dark pigmentation along the very tip of the outer primaries.

There were three almost identical near-adult Iceland Gulls in the harbour. Luckily they were all seen at the same time late in the afternoon; however, if you look careful and compare with this and this you will also see that there are slight differences in the extent of their winter shawl.