Checklist S9282145
Sharing links
Totals
Observations
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Number observed: 75
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Number observed: 1150
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Number observed: 1
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Number observed: 1
Details
Adult graellsii. Very dark mantle, no string of pearls, yellow legs. Yellow bill with red spot on gonydeal area.
Media
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Number observed: 2
Details
Video clip of one of the birds here: http://www.youtube.com/watch?v=PJH-I2nQTlM . Both intermediate in primary pattern, with dark gray or black pigmentation on outer webs of outer primaries, approaching THGU but primary pigmentation not dark enough, and p10 with too much white, and pigmentation not coming proximally far enough (p4 and p5 appeared to lack this). The distance of viewing also contributed to my inability to nail down at least one of these candidates to THGU. Video of one of these birds was inadvertently capture, and extensive analysis, with screencaps, is here: http://aviantendencies.blogspot.com/2011/12/joy-of-long-distance-thayers-gull.html
Media
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Number observed: 2
Details
1st/2nd cycle bird creamy white on entire body, with all black bill. Only a very weak ghost pattern of tail band, body size smaller than HERG. Adult bird smaller than HERG, with very small amount of gray pigmentation on outer webs of outer primaries.
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Number observed: 1
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Number observed: 1
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Number observed: 150
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Number observed: 20
Details
Larger than HERG, with bicolored bill (black tip, horn/pink base), entire bird off-white from wingtip to wingtip and including tail.