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/5047015
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/eurytides_m_macrosilaus_live1.htm
http://www.ross.no/communicate/2011/12/08/yasuni-lepidoptera-08/
To separate from Eurytides (or Protographium) epidaus, which, however has stronger markings/veins on the apical forewing:
http://butterfliesofamerica.com/imagehtmls/Papilionidae/Eurytides_epidaus_epidaus_San_Agustin_Etla_W_slope_Sierra_de_Juarez_OAX_MX_12-Vi-07_Carlos_Galindo-Leal_i.htm
http://butterfliesofamerica.com/imagehtmls/Papilionidae/Eurytides_e_epidaus_M_Cielito_TMP_MX_11-V-02_WGC_2-_i.htm
and Eurytides glaucolaus, which is from Panama to South America, so too far in the south from your spotting:
http://neotropicalbutterflies.com/Site%20Revision/Pages/Swallowtail%20pages/Glaucolaus%20Kite%20Swallowtail.htm
or Eurytides (or Protographium) agesilaus neosilaus which has a shorter stripe #5:
http://butterfliesofamerica.com/eurytides_agesilaus_neosilaus.htm
Here is the whole bulk of these group, please, verify yourself!!
http://butterfliesofamerica.com/t/Eurytides_a.htm
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