Those included seven key species of conservation concern, including Emberiza aureola - a state-level protected wild bird listed as a critically endangered species, and Lanceolated Warbler - a species listed as “Near Threatened” in China.

The society said their survey, conducted from September 1 to December 31 last year, mapped out black spots of bird-window strikes and relevant figures.

The places that recorded the most bird-window strikes are Shatin, Eastern District, Kwun Tong, Wan Chai, and the Islands District.

The society survey also noted that among the 38 bird species involved in the window strikes, nearly 70 percent of them were migrating birds.

Wong Suet-mei, Conservation Officer of the society, suggested authorities draw up new laws to fix the city’s unintended but fatal flaw in the design of building glass that has contributed to the bird-window strikes.

Ninety percent of exterior wall envelopes, and any associated openings for new constructions, shall be constructed with bird-friendly materials up to 75 feet above, the society said.