Coordinators:
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Mars Muusse
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Heermann's Gull heermannii PB3 moult (3CY), September 03 2016, Pismo Beach, California USA. Picture: Alex Abela.
See Alex's Flickr site for many more images, illustrating the plumage development in this species!
Last stage of complete moult with outermost primaries dropped, and central primaries 3rd generation: P7 fully grown.
Note grizzled spotting on head, indicative for 3rd cycle birds.
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Heermann's Gull heermannii