Bulwer's Petrel Bulweria bulwerii
Average number of individuals by week based on Singapore Bird Database data, Jul 2012 to Jun 2022 (all records)
Peak week Apr 23-Apr 29, Apr 30-May 06, Nov 12-Nov 18
Early date 12 Nov 2016
Late date 06 May 2017
Another recent addition to the Singapore checklist, with the first confirmed record in 2016.