You really can't even mention the scale of today's cities with those of the past in the same breath. Taking Taipei for example, forty years ago, besides a few bustling areas like Wanhwa, most everything else was rice paddies.
都市冷氣機口則代替了樹枝，偶爾會有麻雀、白頭翁等鳥築巢；垂直的大廈提供和懸崖面差不多的棲息環境，在國外就有鳶、隼停佇樓頂，沿大樓立面往下滑翔的情形… …。但這些令都市人「大開眼界」的情景，仍只是少數例外。