Black-headed Gull Chroicocephalus ridibundus
Average number of individuals by week based on Singapore Bird Database data, Jul 2013 to Jun 2023 (all records)
Peak week Jan 01-Jan 07
Early date 13 Nov 1986
Late date 15 Feb 1992
Most common gull in Singapore, but still a rare species which is recorded very infrequently. Most recent records have fallen from mid-Dec to mid-Jan.