Koalas and Dropbears

My idea is that there is a new biome called the "Gum Forest" or "Eucalyptus Forest". This new biome is full of Eucalyptus trees and Acacia trees. The Koalas and Dropbears will spawn and live in the biome. The Koala is a passive mob and drop Eucalyptus leaves when killed. The Dropbear on the other hand is hostile and will attack the player, dropping on top of them, from the trees. But it is also able to be tamed. It is tamed using a meat of sorts. And when tamed the Dropbear will follow the player, teleporting when needed. It will also attack like a wolf. However you can also set up a tamed dropbear atop a tree and let it drop on unsuspecting players. It would not drop on players set to the same team as its owner or it. If killed the dropbear would drop its claws. These could be used as a crafting item to make claw hands.