glaucoides - kumlieni

(last update: January 26, 2012)

Coordinators:
Dave Brown (Canada)
Bruce Mactavish (Canada)
Chris Gibbins (Scotland)
Peter Adriaens (Belgium)
Mars Muusse (Netherlands)

Iceland Gull (kumlieni) H8 1st-5th cycle (2CY-6CY), 2013-2017, Quidi Vidi Lake, St. John's, Newfoundland. Picture: Chris van Rijswijk, Peter Adriaens, Lancy Cheng & Alvan Buckley.

Yellow H8 and Fed band no 1106-23067, banded as 1st cycle in winter on January 19 2013, in St. John's, Newfoundland (LAT: 47.80833; LON: -52.80833).

below: Iceland Gull (kumlieni) H8 5th cycle (6CY), January 13-15 2017, Quidi Vidi Lake, St. John's, Newfoundland. Picture: Chris van Rijswijk.

Please visit Chris's blog Birdshooting for funny stories and amazing images.

The pigmentation is really deep dark grey on P9. Wingtip darkness score: 3 - blackish grey (Estimated Kodak 14-17). In the study by Howell & Mactavish, about 5% of Kumlien's Gulls in New Foundland belong to this category, see Table 1.

Pigmentation on P6-P10, with small triangle on P6, broken band on P7 and full band on P8. Wingtip scoring for dark markings on P5-P10: 0-2-3-4-3-1. See Plate 1 for explanation.

Wingtip pattern category: Type K, Stage 4, darker grey or more extensive grey marks on the outer five primaries with complete subterminal bands on zero to three primaries. See primary patterns for explanation. In the study by Howell & Mactavish, about 55% of Kumlien's Gulls in New Foundland belong to this category, see Table 2.

Iris colour variation: Iris colour variation: 1.5 - greenish or yellowish, extensively mottled brown. In the study by Howell & Mactavish, only 4% of the Kumlien's Gulls in New Foundland belong to this category, see Table 3. Classification on speckling: class 3 - speckling 5%-10%.

below: Iceland Gull (kumlieni) H8 5th cycle (5CY), December 29 2016, Quidi Vidi Lake, St. John's, Newfoundland. Picture: Lancy Cheng.

below: Iceland Gull (kumlieni) H8 4th cycle (5CY), February 12 2016, Quidi Vidi Lake, St. John's, Newfoundland. Picture: Lancy Cheng.

Much of an adult in plumage; an open-wing shot may reveal a few dark markings on primary coverts, as well as some dark fringes on some of the underwing coverts.

below: Iceland Gull (kumlieni) H8 4th cycle (5CY), January 30 2016, Quidi Vidi Lake, St. John's, Newfoundland. Picture: Frank King.

Please visit Frank's Flickr photostream.

below: Iceland Gull (kumlieni) H8 4th cycle (4CY), December 24 2015, Quidi Vidi Lake, St. John's, Newfoundland. Picture: Lancy Cheng.

below: Iceland Gull (kumlieni) H8 4th cycle (4CY), December 22 2015, Quidi Vidi Lake, St. John's, Newfoundland. Picture: Lancy Cheng.

Age 4th cycle: showing no immature features.

Compare wingtip to 3rd cycle: the broken band on P6 (in 3rd cycle) is now only a black spot on the outerweb. The bands on P7-P9 are now broken by the shaft.

below: Iceland Gull (kumlieni) H8 3rd cycle (4CY), February 26 2015, Quidi Vidi Lake, St. John's, Newfoundland. Picture: Lancy Cheng.

Oily on plumage, bird was clean one month ago.

below: Iceland Gull (kumlieni) H8 3rd cycle (4CY), January 21 2015, Quidi Vidi Lake, St. John's, Newfoundland. Picture: Lancy Cheng.

Age 3rd cycle: showing some immature features like black in tail, much black on bill, brown wash over coverts.

Primary category: 3rd generation primaries, broken band on P6. Pigmenattion probably 2.5 - medium-dark grey (Estimated Kodak 11-13).

below: Iceland Gull (kumlieni) H8 3rd cycle (4CY), February 03 2015, Quidi Vidi Lake, St. John's, Newfoundland. Picture: Lancy Cheng.

below: Iceland Gull (kumlieni) 2nd cycle (3CY) H8 February 02 2014, Quidi Vidi Lake, St. John's, Newfoundland. Picture: Lancy Cheng.

Age 3cy: showing dark tip on bill, iris getting paler.

Primary category: 2nd generation primaries and tail.

below: Iceland Gull (kumlieni) 1st cycle (2CY) H8 January 24 2013, Quidi Vidi Lake, St. John's, Newfoundland. Picture: Peter Adriaens.

Age 2cy: showing dark bill with pale base, dark iris.

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