When I first came to Costa Rica, I had trouble identifying this species, but I’m relatively certain now, with specific characteristics: Turquoise tips on their antennae, yellow spot behind each eye and at joint of each hind wing, bluish-gray body, plus the dark brown or black “arrow-head” trim on the forward wings. The males are otherwise solid white while the females have a slight brownish hue to the white. You can see the differences in my Great Southern White Gallery. These photos are of a male. To help you see all the characteristics, I’ve included here from a recent sighting in my garden, 3 views: Top of wings, bottom of wings and a folded wings side view, the three views I try but seldom get when photographing all butterflies. 🙂
