This is the amazing Brown Wood Owl (Strix leptogrammica).
This is a very rare owl in Hong Kong, but there seems to be a growing number of breeding pairs, as they "move back" into Hong Kong. This species is a part of the family of owls known as typical owls (Strigidae), which contains most species of owl.
This wonderful creature is actually quite big (45–57 cm), with upperparts uniformly dark brown, with faint white spotting on the shoulders. The eyes are dark brown, and very difficult to photograph, as they are primarily nocturnal.