Tree animation on the map.

Firstly, the game will have whatever is defined within its editor. Secondly, the editor includes object animation and terrain animation. And thirdly, if nothing else helps, check the editor's help section and look there (and you can also check the game's help if that's not enough). If that doesn't work, I don't even know how to help you. I personally like the tree animations, starting with Armageddon's Blade.