Onychoprion anaethetus (Scopoli, 1786)

Bishop, K. David, 2023, The avifauna of Biak Island, Papua, Indonesia with comments on status, conservation, natural history and taxonomy, Bulletin of the British Ornithologists’ Club 143 (1), pp. 3-62 : 35

**BRIDLED TERN Onychoprion anaethetus

Status Regular visitor. Common off most New Guinea coasts (Beehler & Pratt 2016). Recorded in Biak and Supiori waters: 27 April 2007, one between the Padaido Islands and the south coast ( T. Boucher, eBird checklist S26960957); July 2007, c.30 off the beach adjacent to Biak airport ( van Beirs 2007 ); late August 2007, c.15 off the south coast (Bengtsson 2007); 24 August 2008: 25 (A. Whitlock, eBird checklist S48329087); and 6 August 2015: two off Rani (N. Voaden, eBird checklist S24512191). D. Lopez-Velasco (in litt. 2021) noted it as moderately common between Biak and Numfor in July ‒ August.