This is a new species for me and evidently not seen by many since it is not even listed on BAMONA and I am only the 4th person to report observing one on iNaturalist Costa Rica. And of course I think mine are the best photos! 🙂 The Crassus Swallowtail, Battus crassus is found from Costa Rica south to parts of Venezuela & Ecuador. The most photos are found on iNaturalist Ecuador, with 27 observations, while Panama has 5 and Venezuela 4 like us. See all 10 of my photos of this unique butterfly in my GALLERY: Crassus Swallowtail. Here’s just two of those shots . . .
¡Pura Vida!