Most electrical substations are located outdoors and are at risk of power outage accidents caused by various natural phenomena. One impact relates to power outages due to interference from wild animals. Examples include, herons, who use the substation's steel structure for perches, and their highly viscous feces (which can conduct electricity over 1 m in length) cause power outages when it adheres to the insulators. Other examples include damage caused by snakes and rats. This paper outlines actual scenarios of wildlife-related, substation damage in Japan, and other countries, and presents trends and future perspectives on technology, for controlling these types of damage.