Here the preview:
Drawing butterfly is quite fast. Because we just draw one side. And then copy it and flip horizontal and combine it. It's done! You can try to draw another animal like bee, the fly, which is has symmetrical shape. But don't use that way to draw human face, it will looks weird. Because we are different with animals.
OK, I think I have to share my file again. Below is the link that you can download for free for your vector collection.
Don't have corel draw yet? Just download it at right sidebar for personal use only.