Windswept Hills

Windswept hills are uncommon cold biomes that mainly generate in hilly terrain. There are three variants in the biome family.‌

Description
Windswept hills generate in areas with high erosion and low factor. The grass and leaves are an aqua color, the surface is mostly grassy with occasional patches of stone and many blobs and veins of ores. These are the only biomes, besides mountain biomes, where emerald ore is found. The cliffs of the windswept hills generally peak at roughly Y-level 140, and around Y-level 120 rain starts to be replaced with snow, creating snow-capped hills. Undergound, below the sea level, infested blocks with silverfish can be generated, even below the deepslate layer.

Windswept hills have some unusual features and formations compared to other biomes due to the terrain generation algorithm. Floating blocks and even small floating islands are common as are overhangs and large waterfalls (occasionally, even springs and lavafalls). This can create some impressive views at times. These oddities may be magnified in windswept savannas.

Survival in windswept hills can be challenging to beginners, due to the heights often risking heavy fall damage and higher elevations bringing snow and ice, but can be fairly easy once the player has acclimated to the area and found or made a flat-enough space for shelter. Llamas can also serve as useful pack animals when tamed. Water must be protected by light or a roof to prevent it from freezing when above the snowfall line, however, and the player must be aware of their surroundings to avoid falling off steep cliffs, especially when fighting hostile mobs. Care should also be taken when mining in windswept hills, due to infested stone occasionally generating; the player might get swarmed with silverfish if they're not prepared.

Water buckets can be used to climb windswept hills, by dumping the water onto a higher ledge and climbing up to the ledge. The player can safely collect the water into the bucket and repeat the procedure until the player is on top of the hills.

These biomes generate in areas with high erosion and medium to low temperature which means that they are usually surrounded by temperate, cold and snowy biomes. Oak trees occasionally generate in place of some spruce trees. Llamas can spawn in these biomes.

Variants
There are three windswept hills variants.

Windswept Hills
The windswept hills biome is the normal variant. This biome features the standard stony and grassy terrain, with a bit of tall grass and sporadically generated oak and spruce trees. As the climate is cold, rainfall changes to snowfall above approximately Y-level 120 where snow layers form on blocks above that point, along with water freezing into ice. They are one of the two places where llamas can spawn, the other place being savanna plateau biomes.

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Windswept Forest
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

The windswept forest use the same mob spawning chances as the windswept hills.

Windswept Gravelly Hills
The windswept gravelly hills variant replaces the top few layers of stone and grass with gravel across its landscape. Due to the gravel replacing most of the grass, trees generate far less often, making this variant relatively barren. Players should be careful when surfacing from underground in this biome, as the top layers of gravel can pose a suffocation hazard. This variant generates in lower humidity values, mainly next to plains and snowy plains.

Windswept gravelly hills use the same mob spawning chances as the windswept hills.

Removed/unused
These following biome have become unused in Bedrock Edition, and removed in Java Edition.

Gravelly mountains+
Gravelly mountains+) (also referred to as modified gravelly mountains in the code) was a rare variant of the windswept forest biome that likely due to an oversight had the exact same features as the regular gravelly variant, making this biome indistinct from the former. The only difference was that it could rarely generate by itself as a thick separation when a desert lakes biome bordered a snowy biome.

Gravelly mountains+ had the same mob spawning chances as the default windswept hills biome.

Mountain edge
The mountain edge variant used to generate before Java Edition 1.7.2. It became unused after that version and was later removed in 1.18. Similar to the jungle edge biome, it was a technical biome intended to provide a smooth transition from other biomes to the mountains. It resembles the windswept forest but with lower and less extreme terrain.

Mountain edges have the same mob spawning chances as the windswept hills biome.

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