Butterflies are a sign of a healthy environment. They indicate a wide range of other invertebrates which, collectively, provide environmental benefits, including natural pest control and pollination. Of course, butterflies are beautiful to look at; just the thought of them instantly brings to mind warm summer days as they flutter gently by on the breeze. Take this handy pocket reference with you next time you go for a walk in town or country, you may just be lucky enough to see one of the butterflies detailed here.