GullDK: Larus glaucoides glaucoides

Showing posts with label Larus glaucoides glaucoides. Show all posts

Wednesday, 9 July 2014

Iceland Gull (Larus glaucoides), 3cy, 08.01.2012, Blåvandshuk, Blåvand

Date: 2012-01-08
Site: Blåvandhuk, Denmark
Observer: *Henrik Brandt, *Per Poulsen

It is considered to be an Iceland Gull (Larus glaucoides) though this is not to say it is not a Kumlien's Gull. It has without doubt some faint pigmentation along the tip of the outer primaries. However, 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 these 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 just a trait of immature plumage.

Date: 8.1.2012. Foto: Henrik Brandt

Date: 8.1.2012. Foto: Per Poulsen

Iceland Gull (Larus glaucoides), 3cy, 10-11.01.2012, Hanstholm Slamdepot

Date: 2012-01-10 -(01.11)
Site: Hanstholm Slamdepot, Denmark
Observer: John Kyed, *Peter Hedegaard Kristensen, Henrik Haaning Nielsen m.fl.

It is considered to be an Iceland Gull (Larus glaucoides) though this is not to say that it could not be a Kumlien's Gull. It has without doubt some faint pigmentation along the tip of the outer primaries. However, 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 these 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 just a trait of immature plumage.

Date: 10.1.2012. Foto: John Kyed

Date: 11.1.2012. Foto: Henrik Haaning Nielsen

Date: 28.1.2012. Foto: John Kyed

Possible Kumlien's Gull (Larus [glaucoides] kumlieni), 3cy, 23.01-03.03.2012, Thyborøn Harbour

Case: 2013-169
Date: 2012-01-23 -(03-03)
Site: Thyborøn Harbour, Denmark
Observer: *Henrik Haaning Nielsen, Allan Kjær Villesen 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 dark shading on the outer webs of the outer primaries with the colour being darker on the outer than on the inner web, but the flight shots do not seem to show a clear Kumlien's/Thayer's pattern on the outer. Even though the dark shading on P7-P9 reaches the primary tips, the dark pattern does not seem to penetrate onto the inner web, i.e. the bird seems to lack the dark hook-pattern on the inner web. It is also difficult to determine whether there is a faint 'ghost mirror' on P10. This could be caused by the state of the plumage which seems to be rather bleached and especially so on the last photos which were taken in March. As a result it does not seem safe to exclude a well-marked glaucoides.

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: 23.1.2012. Foto: Henrik Haaning Nielsen

Date: 23.1.2012. Foto: Henrik Haaning

Date: 3.3.2012. Foto: Henrik Haaning Nielsen

Date: 3.3.2012. Foto: Rune Sø Neergaard

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