Blue or Variable Cracker - Hamadryas Feronia

Another BH species I’m afraid as I’ve nothing else today. 
This is one of the brush footed butterfly species from Central/South America  and got its common name due to the unusual way that males produce a “cracking” sound with their wings as part of their territorial displays. I can’t say I have heard this, but it would be amazing to hear from such a delicate butterfly.