With mid-March bringing unseasonably warm temperatures, bugs that hunker down for the winter are already starting to emerge ...

And they’re lousy houseguests. When boxelder bugs swarm in great numbers, they can stain walls and curtains with their excrement. To keep out them out of your house, the time to start is now.

They may be harmless, but boxelder bugs still have the power of Alfred Hitchcock’s flying swarms of birds this time of year in Minnesota, if only to those with imaginations. In “The Birds ...