There is a great documentary about butterfly migration...how the butterflies, like birds, migrate to the same places year after year. Fascinating the intelligence in something so small. When I first moved to North Carolina, one of the most fascinating experiences I had was to witness a huge (do you call it a flock?) group of butterflies moving across my front yard. I can only think they were migrating. When you see a butterfly, you just can't help but think about how beautiful life and living creatures are.