glaucoides - kumlieni
(last update: January 26, 2012)
Table 3 & 4: Iris colour variation in 393 adult Kumlien’s Gull from Newfoundland and in 283 adult Thayer’s Gulls from California.
From: Identification and Variation of Winter Adult Kumlien’s Gulls, by Steve N.G. Howell & Bruce Mactavish, IN: Alula 1/2003.
We used the same scores for eye colour as those of Howell and Elliott (2001, on Thayer's Gulls):
See also iris speckling classification used for scoring.
All thumbnails and links to the images: pictures by Dave Brown, see his weblog on Newfoundland Birdwatching.