Here are some books I checked out of the library about butterflies. They are beautifully put together and are very informative for any child's curiosity.
The Life Cycles of Butterflies is a guide to 23 common garden butterflies throughout North America. It includes maps of each butterfly's geographic location, beautiful pictures of butterflies and caterpillars and the life cycle of butterflies from egg to maturity. This book is for an older reader or an adult can read this to their children.
From Caterpillar to Butterfly is about the Monarch butterfly. It is perfect for early elementary children to read and understand. The book covers the entire life cycle, location and interesting information about the Monarch.