This striking 80-seniti stamp from Niuafoʻou, Tonga, features the Blue Moon Butterfly (Hypolimnas bolina), also known as the Great Eggfly. The design captures the butterfly’s velvety dark wings marked with vivid, iridescent blue-white spots, a trait that has made it one of the most admired tropical butterflies. Issued as part of a thematic series showcasing local fauna, it highlights the island’s natural biodiversity. With its detailed artwork and vibrant background of floral motifs, the issue appeals strongly to collectors of butterflies on stamps, Pacific island issues, and thematic wildlife collections.