Black Tern
Also known as: White-winged Black Tern
24 cm (10") Rare. Alaska. Visits from Eurasia. Similar to Black Tern but has a shorter less forked tail and in breeding black wing linings. Was called White-winged Black Tern.
Videos
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Credit: FoghornsBirdingVideo
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Credit: septembernevel
Images
Credit: Frank Vassen
Credit: Ron Knight