Transparent utfyllnad Black TernChlidonias niger surinamensis
A nice bird of the North American race surinamensis in Funchal Harbour on 19th August 2007. All-dark body (almost as White-winged Black Tern) and white leading edge of wing. There are only a handful records in WP of the subspecies and the first for Madeira (as well as the first dated record ever!) Photo: Magnus Ullman, Sweden.

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