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Mexican Species
| Royal Tern (Thalasseus maximus) | |||
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| Subspecies | |||
| Monotypic: Breeds from southwestern United States (southern California) to northwestern Mexico (south to Sinaloa), and eastern United States through the West Indies to the Guianas and possibly Brazil, wintering south to Peru, Uruguay, and Argentina; also a disjunct breeding population in northern Argentina and southern Brazil | |||
| Endemic status | Not endemic | ||
| Birds (media) | Yes | ||
| Sound Guide | |||
| Comment | In general the literature says that adult birds don't acquire full alternate plumage until March-April. This is not the case with birds on the Pacific coast around Colima. Here I see a large percentage of birds with a full dark crown already in January-February. | ||
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