Every year there seems to be a different insect making a nuisance of itself. Some of them are harmless , but some are plagues upon us or our forests. It was only a year ago that Gypsy moths made their presence known in southern New England, where trees in some areas were hit pretty hard by the voracious caterpillar. And while incidents like these tend to spark a lot of discussion about how people might help reduce the damage, it’s worth remembering that the trees these caterpillars feed on are