I’ve seen and photographed a lot of Yellows, but not only is this one new to me, there is only one other on butterfliesandmoths and it was submitted from the Dominican Republic, West Indies. I got several shots almost identical to this one on the tiny wildflower and then he was off, not to be seen again! 
Butterflies of America has photos only of the old-fashion pinned specimens while iNaturalist has several live photos from South America & West Indies, if you click on “View More” after their first little photos. Both of those sites have a little bit of info on the species though they don’t include it being in Costa Rica! But that is okay because being in the geographical center of the isthmus between North & South America, we get migrants of all species from both continents! (And West Indies!) Maybe my photos will change the ranges for this butterfly on some of these “official” websites! Right now they all say that it is only found in the West Indies (Caribbean Islands) and South America. I fooled them, didn’t I!
¡Pura Vida!