Pacific Swift
Apus pacificus
Estimated average number of individuals by week based on
eBird
data, Jul 2014 to Jun 2024
Peak week
Oct 22-Oct 28
Early date
22 Jul 2017
Late date
20 May 1989
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A fixture at raptor migration hotspots in Oct and Nov. With some effort (and very good photos), you may be able to pick out a Cook's Swift, which has not yet been recorded in Singapore as of Sep 2022.