For instance, English ivy and rock pigeons climb and roost on vertical structures like trees and cliffs anyway, so brick walls and sky-high ledges are fine substitutes.

例如，英国常春藤和岩鸽原本就会在树木和悬崖等垂直结构上攀爬和栖息，所以砖墙和天空中的壁架是很好的替代物。

For instance, English ivy and rock pigeons climb and roost on vertical structures like trees and cliffs anyway, so brick walls  and sky-high ledges are fine substitutes.

和原鸽原本就能爬上像树木和悬崖一类的笔直物体并在上面筑巢，因此砖墙和高楼的窗台都不成问题。以杂食为生的浣熊。