Onychoprion anaethetus -- Bridled Tern, Charrán embridado, Sterne bridée. Alternate name on piece: Onychophrion fuliginosus [Sooty tern] Artist's name(s): Gould, John; Richter, Henry Constantine. One bird quite well finished; the other seems to be Gould's original sketch, worked up by Richter, and then heavily overdrawn by Gould.