There have always been field guides to butterflies and moths, my favorite types of insects. My biggest complaint with them though is that they are never complete; they are always missing some important aspect for each species. For the most part, these guides concentrate on the adult butterfly or moth, rarely showing the other three stages of development (egg, larva and pupa). I am guessing that the main reason for this is cost and eventual size of the book. To show all four stages of each species, and then perhaps images of both the male and female, along with text, would create a book that is cost prohibitive.