Western Gull occidentalis(last update:
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Coordinators: 1cy June 2cy Jan 3cy Jan 4cy / sub-ad Jan adult Jan |
Western Gull occidentalis sub-adult, July 1989, California, USA. Picture: Alex Abela.Complete moult underway, inner primaries dropped, P7-P10 old. Bird difficult to age, brown primaries and very worn brownish secondary tips may indicate old 2nd gen feathers, and if so, this bird would be in 3CY. However, very mature bill and rectrices advocate 4CY bird, but maybe such birds with moulting inner primaries best labeled 'sub-adult'. |