This Blurry-striped Longtail, Chiodes catillus (my gallery link) is also sometimes called White-striped Longtail by some sources. It is a less seen longtail skipper, but one of the many species that make up the huge biodiversity of Costa Rica! Here’s two shots of the same individual showing the difference in color that bright sunlight or shadows can make on these butterflies. 🙂
¡Pura Vida!