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Mark B Bartosik | all galleries >> From the field - current news photoblog >> Black Tern - juvenile Chlidonias n. surinamensis with niger hood pattern and other plumage variations > Black Tern HY head patterns.jpg
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Black Tern HY head patterns.jpg

Fig. 1 a-d. Composite photo illustrating a few examples of head patterns that can be found in juvenile Chlidonias niger surinamensis migrating through Texas coast in late August.

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