Monarch butterflies are over-wintering down by the bay, the first time in memory that they have been spotted here. Butterfly logic is a little-understood science, but the heavy rains we had last year may have been a factor in their decision to locate in this particular area of the California coast. If you didn’t know where to look you would walk right by and never notice them hanging like clusters of grapes hidden up in the branches of the eucalyptus trees. You look at what appears to be a shadowy mass among the leaves, and then realize it’s made up of hundreds of butterflies. When a few of them spread their brilliant orange wings and begin fluttering around the grove, it’s magical.