Black-and-white colobus monkeys depend on continuous forest canopy and face welfare harm from fragmentation that forces dangerous ground crossings between forest fragments.
Colobus monkeys crossing roads between forest fragments face vehicle mortality and predation risk outside their arboreal comfort zone. Social groups that lose members to road mortality show disruption to social structure. Forest fragment edges expose groups to greater wind chill, drying and reduced food quality compared to interior forest. Canopy bridges provide safe crossing and have been shown to be used readily by colobus in areas where they have been installed.