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It has been so cold in Fort Collins, lately! I thought maybe some of you could use a photo quiz from a warmer clime (but still in the United States).
Did I have any of you running to your field guides looking up the differences between Sooty and Bridled Terns? Did you notice that the white line above the eye (supercilium) on Bridled Terns extends well behind the eye and it doesn't on Sooty Terns? Also, did you notice the differences in contrast between the underwing coverts and the flight feathers of Sooty and Bridled Terns? It is fairly strong on Sooty Terns, not so much on Bridled Terns. So, our bird with a short supercilium and strongly contrasting underwing is a Sooty Tern.
I took this photo of a Sooty Tern in Dry Tortugas National Park, Florida in April 2009.
People who submitted correct answers were:
Karen Carlsen
Lucas Foerster
Joel Such
Marcel Such
Deirdre Viel
Thanks!
Jeff
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