Long-tailed Skua - Stercorarius longicaudus
“Po Toi and HK Southern Waters” is the usual billing for Hong Kong Bird Watching Society boat outings that aim to find seabirds.
These spring boat trips usually stop over for a hour or two on Po Toi Island itself, where there can be some migrant landbirds.
Two examples here: the Ashy Minvet is a regular bird of passage on Po Toi,
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