Black-crowned Night Heron

 

Black-crowned Night Heron.
2021 Jul 30th @ Ang Mo Kio Bishan Park.
A uncommon resident and this is the only time I spotted it and have thought it was a Straited Heron.
Only today (Jun 2022) when I was doing hard disk birding that I realised I have actually spotted a Black-crowned Night Heron before. 
My precious one and only picture and hope I will meet one again soon.