Whiskered Tern
Chlidonias hybrida
Estimated average number of individuals by week based on
eBird
data, Jul 2013 to Jun 2023
Peak week
Sep 17-Sep 23
Early date
28 Aug 2016
Late date
28 May 2009
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A annual migrant through Singapore, with most records in Sep-Nov and much smaller numbers in the spring.