OAKLAND — The annual spectacle involving tens of thousands of ladybugs, or a loveliness, converging near two specific trails in Reinhardt Redwood Regional Park is underway now through mid-February.

Every autumn, ladybugs (which are really lady beetles) seem to swarm near or even inside some homes. There can be so many of them that they stain walls and make a room smell really bad. Ladybugs have ...