Northern Boobook Ninox japonica
Average number of individuals by week based on Singapore Bird Database data, Jul 2013 to Jun 2023 (all records)
Peak week Nov 05-Nov 11
Early date 25 Oct 2022
Late date 25 Apr 2020
Peak migration for this species occurs in the first half of Nov, although it's occasionally sighted outside of this period. Teardrop-shaped underpart markings, compared to heart-shaped markings in Brown Boobook, are the main identification feature.