The ideal width of a corridor depends on the type and size of animals using it. A corridor 250 -350 metres wide is the minimum requirement for large carnivores. The length of a corridor, or the distance between quality habitat patches, should be as short and direct as possible. Vegetation is required by many animals for warmth and security. Both cougar and black bear prefer continuous forest cover.
Darkness also provides natural cover.
For this reason, cougars prefer to travel at night. Secondly, and perhaps more importantly, is the shy, discreet nature of large carnivores. A result of protecting corridors is that wildlife will not be forced into more developed areas. We know from experience that wildlife habituated to humans are inevitably involved in aggressive threats to people and this frequently leads to the eventual relocation or death of the offending animal. All three corridors are used by human-tolerant species such as elk and coyotes.