Silver-backed Needletail Hirundapus cochinchinensis
Average number of individuals by week based on Singapore Bird Database data, Jul 2016 to Jun 2023 (all records)
Peak weeks Nov 12-Nov 18, Nov 19-Nov 25
Early date 08 Sep 1990
Late date 07 Apr 2001
All confirmed records in the last 10 years have come during the months of Oct and Nov, and mostly seen at the end of Nov.