Thayer's Gull (thayeri)
(last update: January 22, 2013)
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 |