To me, the sashing fabric already looks like jungle.
I really like this top. As much as I like the idea itself, I would be worried that adding a different green for grasses at the bottom and blue sky at the top will add clutter to both the colors and textures. For me, anyway, the best thing to do would be to add one more row of tigers and an inner border to match the sashing. If more size is wanted after that, then perhaps another border of cat paw prints or tiger-strip fabric.