Also in Sai Kung, and shot at the same time and place as the egret from the day before is the wonderful and huge white-bellied sea eagle (Haliaeetus leucogaster), also known as the white-breasted sea eagle.
These typically patrol further offshore, but you can see them high in the sky over sai kung sometimes, in pairs or with young; or you can get lucky sometimes like here, when the bird flew near the pier.
This bird is a large diurnal bird of prey in the family Accipitridae
The species is monogamous, with pairs remaining together until one bird dies, after which the surviving bird quickly seeks a new mate. This means that they return to the same nesting sites....near sai kung.