Minecraft is finally getting some birds! Parrots are really interesting mobs. They will mimic the sounds of other mobs around them. They’ll also follow all mobs, whether they’re hostile or not. You can tame them with cookies. This is the addition I’m most looking forward to. I want the blue one, of course!
This update also introduces a new feature, the recipe book, which makes it unnecessary to look up crafting recipes. You’ll see it in your inventory screen. If you use it and select what you want to craft, it will put the required materials in the required order, so long as you have the materials in your inventory.
The achievement system has been updated as well. The game will also run on Java 8. There are plenty of other things in this update. To get a good feel of what’s in it, I recommend watching the video in this post.
For more details see the wiki: http://minecraft.gamepedia.com/1.12