Thayer's Gull (thayeri)

(last update: January 22, 2013)

Coordinators:
Amar Ayyash (USA)
Mars Muusse (Netherlands)

Thayer's Gull - Table 3.

From: Identification and Variation of Winter Adult Thayer’s Gulls with Comments on Taxonomy, by Steve N.G. Howell & Martin T. Elliott, IN: Alula 4/2001.

Table 3. Correlation of iris colour and P10 score for 102 adult Thayer’s Gulls in central California (see Methods).

. P10 Score = 3 P10 Score = 4 P10 Score = 5 Totals
Iris Score = 0.0 0 0 1 1
Iris Score = 0.5 5 2 6 13
Iris Score = 1.0 3 8 18 29
Iris Score = 1.5 3 9 14 26
Iris Score = 2.0 2 3 12 17
Iris Score = 2.5 3 5 3 11
Iris Score = 3.0 0 2 3 5
Totals 16 29 57 102