glaucoides - kumlieni

(last update: January 26, 2012)

Kumlien's Gull (kumlieni) adult, January 23 2013, Quidi Vidi Lake, St. John's, Newfoundland. Picture: Jan Baert.

Age adult winter, lacking brown wash on primary coverts. Note the indistinct division between the white tips of the primaries and the slightly darker, greyish centres. Note also slender bill, pale iris.

Wingtip darkness score: 2 - medium grey (Estimated Kodak 7-10). In the study by Howell & Mactavish, about 77% of Kumlien's Gulls in New Foundland belong to this category, see Table 1.

Wingtip scoring for dark markings on P5-P10: 1-3-4-5-5-1. See Plate 1 for explanation.

Wingtip pattern category: Type M, 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: 3 - apparently unmarked pale yellow (like an adult Herring Gull but typically slightly darker yellow). In the study by Howell & Mactavish, 19% of the Kumlien's Gulls in New Foundland belong to this category, see Table 3. Classification on speckling: -