The Gambia less than wide at its widest point, with a total area of . About (11.5%) of the Gambia's area are covered by water. It is the smallest country on the African mainland. In comparative terms, the Gambia has a total area slightly less than that of the island of Jamaica. Senegal surrounds the Gambia on three sides, with of coastline on the Atlantic Ocean marking its western extremity. The present boundaries were defined in 1889 after an agreement between the United Kingdom and France. During the negotiations between the French and the British in Paris, the French initially gave the
Wildlife of the Gambia angolensis)", crakes, greater painted snipe "(Rostratula benghalensis)" and African jacana (Actophilornis africanus). Butterfly faunal distribution in the Gambia is dictated by the boundary of two major biomes of Sahelian and Guinean Savanna species; it is distinctly different between the rainy season and dry season. The vegetation of the Gambia is mostly savanna in the upland areas, inland swamp in the low-lying areas, and mangrove swamp along the banks of the lower Gambia River. The country is almost devoid of true forest cover, the most forested area being the Bijo Forest. Nonetheless it is biologically rich, with an estimated 11,600 plant