Minecraft wiki entry for Windswept_Hills, associated text: The windswept forest variant has sparse forests of oak and spruce trees. It lacks stony terrain so that the tall grass and trees can generate more often. While the increased wood supply can be useful, the risk of fatal fall damage still exists, especially if this variant generates on the edge of a tall hill that borders a river or another low-elevation biome. This variant generates in areas with high humidity, which means it is usually surrounded by forested biomes like taigas and birch forests