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Hi Joyloisa, I hope you are well. Please consider adding this to the Mission Paso Pacifico survey. Spottings like this will aid in science and funding in this area of the tropical dry forest. https://www.projectnoah.org/missions/504...
On of the most trickiest groups of Swallowtails. You have sometimes to count each vein, stripe and marking. It is definitely an Eurytides sp., formerly (sometimes still) called Protesilaus sp.. After doing a little search I think it is Eurytides macrosilaus:
http://butterfliesofamerica.com/eurytide...
http://www.ross.no/communicate/2011/12/0...
To separate from Eurytides (or Protographium) epidaus, which, however has stronger markings/veins on the apical forewing:
http://butterfliesofamerica.com/imagehtm...
http://butterfliesofamerica.com/imagehtm...
and Eurytides glaucolaus, which is from Panama to South America, so too far in the south from your spotting:
http://neotropicalbutterflies.com/Site%2...
or Eurytides (or Protographium) agesilaus neosilaus which has a shorter stripe #5:
http://butterfliesofamerica.com/eurytide...
Here is the whole bulk of these group, please, verify yourself!!
http://butterfliesofamerica.com/t/Euryti...