http://www.sciencekids.co.nz/sciencefacts/animals/butterfly.html
http://www.kidsbutterfly.org/faq
http://www.thebutterflysite.com/facts.shtml
http://www.enchantedlearning.com/subjects/butterfly/allabout/
http://www3.canisius.edu/~grandem/butterflylifecycle/The_Lifecycle_of_a_Butterfly_print.html