2. There is no one-size-fits-all
Each wildlife corridor needs to be designed with the local species in mind. Some species will do just fine with relatively narrow corridors, while others that are less used to human presence simply won’t use them. Many factors play a role in how attractive a wildlife corridor will be to animals: terrain type, vegetation cover, snow depth, topography, physical barriers of various kinds, and of course, human presence (including smells and noises).
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