The Grass Block is the main landcover block for most biomes and the only block that can spawn Sheep, Pigs, Cows and Chickens. It is a Dirt block with a grassy "tuft" on top. Grass will disappear off it when it is away from sunlight. Grass Blocks will be eaten by Sheep, turning them into Dirt. When a player right-clicks a Grass Block with Bone Meal, Tall Grass, Poppies and Dandelions may grow. Grass will slowly spread to surrounding dirt blocks. Mycelium will spread onto grass blocks, however.