Croatia can be classified as a Pannonian-Adriatic country due to its Central European and Mediterranean position. In terms of International law, the traditional heritage has moved from a Middle Age Princedom (791-924 A.D.) and Kingdom (925-1102) to its current standing as the Republic of Croatia, declared on June 25, 1991.
Vegetation cover is very diverse. Forests make up 36% of the surface area. In the continental regions, the dominant forests are English oak, hornbeam, beech, and fir.
The coastal belt and islands are characterized by alpine pine, downy oak, white and dark hornbeam and dense evergreen underbrush. Rivers belong to the Black Sea (62%) and Adriatic (38%) drainage basins. source: MVPEI