The feature photo or the next two shots after this top view shows the “broken silver drop” as the odd-shaped white spot. The scientific name is Epargyreus exadeus and it is one of the many Skipper butterflies which you can read about on butterfliesandmoths.org.
See my Broken Silverdrop Gallery . . . or . . .
See all my Costa Rica Butterfly Galleries.
And in Tico Times English Newspaper:
A new one-year resident of CR from Asia writes: “6 Reasons Why I Love Costa Rica as an Expat.”