Few other studies have explicitly addressed the question of how wide a corridor should be, and they mostly do it at a small scale. For example, one study intended to determine the minimum corridor width for streams concluded that there was no one standard width that could effectively maximize biodiversity conservation. Another study on voles concluded that the best corridor width was 1 m wide, but it only tested corridors up to 3 m wide. A study on dispersal behavior of frogs and salamanders provides a useful method for determining optimal corridor width, but without providing explicit values.

A detailed map of the hoped for Western Wildway Network corridor

For now the question of corridor width remains, with the most applicable answer coming from Beier’s 2 km rule of thumb. Land managers, stakeholders, conservation planners, and communities in general would benefit from more research, more discussion, and better consensus to the answer of this challenging question.


Beier P. 2018. A rule of thumb for widths of conservation corridorsConservation Biology. DOI: 10.1111/cobi.13256.
Andreassen HP, Halle S and Ims RA. 1996. Optimal width of movement corridors for root voles: not too narrow and not too wideJournal of Applied Ecology 33: 63-70.