Quite common among the cabanas. I also saw this species sitting on the head of the turtles, possibly harvesting salts – to the frustration of the turtles. Sometimes a particular turtle seemed like a beacon of temptation as it had 3-4 butterflies fighting for space on its head. The turtle would try to avoid them by retracting its head, but of course they came back. The only solution was to jump into the water and hope for better luck next time.

Thanks to Kim Garwood for identification!