This beautiful 15-cent definitive stamp from Kiribati features the Reef Egret (Egretta sacra), shown standing among the island’s rocky shallows. The crisp artwork captures the natural coastal habitat of this elegant wading bird. Overprinted with “O.K.G.S.” (Official Kiribati Government Service), this issue was used for official correspondence. Such overprints are prized by collectors for their limited issuance and historical administrative significance, especially from smaller Pacific nations like Kiribati.