Aleutian Tern
Onychoprion aleuticus
Estimated average number of individuals by week based on
eBird
data, Jul 2014 to Jun 2024
Peak week
Oct 08-Oct 14
Early date
20 Aug 2011
Late date
15 May 2011
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A pelagic trip in Sep or Oct will be your best bet to see this species, which passes through Singapore during these months.