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Hamadryas sp.
Blue, white and orange butterfly.
Landed on my daughters shirt at the San Diego Zoo Safari Park. "It is found from Mexico south to the Amazon Basin." - Wikipedia
"They acquired their common name due to the unusual way that males produce a "cracking" sound as part of their territorial displays." - Wikipedia
Thank you bayucca! It flew off before I was able to get a ventral shot. I've updated the ID to Hamadryas sp.
Unfortunately an ID is not possible. If you have a ventral view it is quite "easy". It is either Hamadryas amphinome or Hamadryas arinome, with a tendence to Hamadryas amphinome. I think it is not serious enough to call this just Hamadryas amphinome only because it is found in a butterfly zoo.