Bamboo mountains

As the name suggests, it is a new mountain where bamboo is produced.
This mountain is a very cold biome because the color of bamboo is a bit astringent brown and it is often produced with snow.
Goats, pandas, and rabbits appear in this biome.
And two new mobs will appear in this biome.
Both of these mobs have in common that they are endangered species.
It's a snow leopard and a grouse.
Snow leopards are neutral to the player unless they offend them.
And grouse is a friendly mob that is not good at flying.
However, the feature is that the probability that this mountain will be generated is very low.
If you have any other good ideas, please let us know in the comments.
Thank you for taking a look at my idea.