Jungle Layers

Can you add "layers" to Jungles? Right now Jungles are a bit boring as they have a lot less variation than real jungles ( Only Pandas and Parrots ). A great way to fix this would be to add "layers" to Jungles to give them a more immersive feeling. As you go from one layer to another, For example from the forest floor to the understory, the sky would be more visible and we would find shorter trees. And from there if we move to the Canopy we would be able to somewhat see the sky more clearly and there would be more birds.