A savanna is a grassland biome characterized by the trees being small or widely spaced so that the canopy does not close.
It is often believed that savannas feature widely spaced, scattered trees. However, in many savannas, tree densities are higher and trees are more regularly spaced than in forest. Savannas are associated with several types of biome. Savannas are frequently in a transitional zone between forest and desert or prairie Savannas cover 20% of the globe not including oceans. The largest area of savanna is in Africa.
