glaucoides - kumlieni

(last update: January 26, 2012)
Coordinators:
Dave Brown (Canada)
Bruce Mactavish (Canada)
Chris Gibbins (Scotland)
Peter Adriaens (Belgium)
Mars Muusse (Netherlands)

PDF's
Ringed birds
Iris classification
Primary classification

1cy Aug - Dec

2cy January
2cy February
2cy Mar - Apr
2cy summer
2cy Sept - Dec

3cy January
3cy February
3cy Mar - Apr
3cy summer
3cy Sept - Dec

sub-ad Jan - Apr
sub-ad summer
sub-ad Sept - Dec

adult January
adult February
adult Mar - Apr
adult summer
adult Sept - Dec

Iceland Gull (glaucoides) adult, January 14 2012, Lauwersoog, the Netherlands. Pictures: Claudia Burger & Guido Meeuwissen.

Wingtip darkness score: 0 - white (Kodak 0). In the study by Howell & Mactavish, about 6% of Kumlien's Gulls in New Foundland belong to this category, see Table 1.

Wingtip scoring for dark markings on P5-P10: 0-0-0-0-0-0. See Plate 1 for explanation.

Wingtip pattern category: Type A, Stage 0; unmarked white wingtip. See primary patterns for explanation. In the study by Howell & Mactavish, about 4% of Kumlien's Gulls in New Foundland belong to this category, see Table 2.

Iris colour variation: 3 - apparently unmarked pale yellow (like an adult Herring Gull but typically slightly darker yellow). In the study by Howell & Mactavish, about 19% of Kumlien's Gulls in New Foundland belong to this category, see Table 3.

Below: January 14 2012, Lauwersoog, the Netherlands. Pictures: Claudia Burger.

Below: January 14 2012, Lauwersoog, the Netherlands. Pictures: Guido Meeuwissen.