… Every few years, wild pigs emerge from river habitat to wreak havoc in the Fairmount Park area. … The pigs currently roaming Riverside’s corridors descend from domestic swine that escaped during catastrophic 1930s floods. … The Santa Ana River corridor creates a green highway connecting rural habitats to urban resources, with residential neighborhoods serving as unintended waypoints between wilderness areas. … The pigs have inhabited these river bottoms longer than most human families, and they’ll probably outlast current management strategies too.