Coordinators:
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John Cant
Mars Muusse
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1cy June
1cy July
1cy Aug
1cy Sept
1cy Oct
1cy Nov
1cy Dec
2cy Jan
2cy Feb
2cy March
2cy April
2cy May
2cy June
2cy July
2cy Aug
2cy Sept
2cy Oct
2cy Nov
2cy Dec
3cy Jan
3cy Feb
3cy March
3cy April
3cy May
3cy June
3cy July
3cy Aug
3cy Sept
3cy Oct
3cy Nov
3cy Dec
4cy / sub-ad Jan
4cy / sub-ad Feb
4cy / sub-ad March
4cy / sub-ad April
4cy / sub-ad May
4cy / sub-ad June
4cy / sub-ad July
4cy / sub-ad Aug
4cy / sub-ad Sept
4cy / sub-ad Oct
4cy / sub-ad Nov
4cy / sub-ad Dec
adult Jan
adult Feb
adult March
adult April
adult May
adult June
adult July
adult Aug
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adult Oct
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adult Dec |
California Gull californicus 1st cycle (1CY), September 12 2014, Half Moon Bay, San Mateo Co., CA. Picture: Amar Ayyash.
Please visit Amar's Anything Larus site for more images!
Very plain greater and median coverts. Note the dark post-ocular line. Undertail coverts plainer than most Herrings.
Overall, 1st cycle California Gulls have upperwing coverts that are weakly patterned and not as neatly shaped as similar-aged Herrings. Their bills are mostly straight with little expansion to the gonys. By early October the bill pattern is two-toned on almost all individuals, but some birds can exceptionally retain a mostly black bill into late October. On average, the species appears shorter and smaller than Herring but slimmer towards the rear with longer wings.
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California Gull californicus