Wildlife corridors connecting fragmented habitats allow animals to move safely between areas. Their welfare significance goes beyond population viability to include the individual experience of movement and access to resources.
Wildlife corridor welfare significance operates at both population and individual levels. At the population level, corridors enable gene flow that prevents inbreeding depression and disease spread. At the individual level, corridors allow animals access to seasonal resources, mates, and territories that fragmentation denies. Isolated animals like mountain lion P-22 demonstrated both the welfare costs of isolation (mange, injuries from territorial disputes with no escape routes, nutritional stress from limited prey base) and the public engagement potential of individual wildlife stories. Vehicle collisions during unprotected road crossings cause traumatic injury and death. Connectivity infrastructure including wildlife crossings and urban corridors addresses both the safety and resource access components of individual animal welfare.