It’s daffy season once again and Nantucketers and visitors alike celebrate this sure sign of spring. As the weather warms up, however, another sign of the season will emerge. Rather, they will hatch. I’m talking about one of my favorite native species, the Eastern Tent Caterpillar (ETC). I have written about the ETC before explaining the natural history and amazing ecology of the species. However, it’s worth mentioning again since this year will be a boom year.