Periodic plumage changes in birds

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Periodic plumage changes in birds
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Gavia immer (Brünnich) Great Northern Loon
Gaviiformes, Gaviidae
Adult in non-breeding plumage.
Canada, Ontario, Barrie, Simcoe Lake.
11/2/2026
AN005'11-261102059'JJK
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Periodic plumage changes in birds Periodic plumage changes in birds Periodic plumage changes in birds Periodic plumage changes in birds Periodic plumage changes in birds Periodic plumage changes in birds Periodic plumage changes in birds Periodic plumage changes in birds Periodic plumage changes in birds Periodic plumage changes in birds Periodic plumage changes in birds Periodic plumage changes in birds Periodic plumage changes in birds Periodic plumage changes in birds Periodic plumage changes in birds Periodic plumage changes in birds Periodic plumage changes in birds Periodic plumage changes in birds Periodic plumage changes in birds Periodic plumage changes in birds Periodic plumage changes in birds Periodic plumage changes in birds Periodic plumage changes in birds Periodic plumage changes in birds Periodic plumage changes in birds