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New York City. This densely built-up landscape is as unnatural as anywhere on Earth.
紐約。這座高樓林立的城市與地球上許多地方一樣遠離自然。
And yet, this wild peregrine falcon looks out onto an ideal habitat.
而這只游隼正站在高處俯瞰這座城市。
Strange as it may seem, this vastly-altered landscape replicates the conditions in which peregrines evolved.
奇怪的是，這片變化巨大的土地竟然重現了游隼進化的生境。
The towering buildings have a multitude of ledges on which falcons can nest,
高聳的建筑上面有許多平臺可供游隼筑巢，
and the high perches that they need to catch the wind.
鳥巢高度也足夠他們乘風飛翔。
New York City has the highest density of nesting peregrines anywhere on the planet.
紐約市的游隼密度居世界之最。
Winds striking the sides of the skyscrapers are deflected upwards and can help the birds gain height.
風被摩天大樓阻擋后會向上偏轉有利于游隼飛得更高。
And the great areas of concrete roasting in the sun create thermals,
烈日下大面積的混凝土散發的熱量形成上升熱氣流，
so that, with very little effort, the birds can soar over the city.
游隼不費吹灰之力，便可以在城市上空翱翔。
