Butterfly Model Step 5

Crease the fold back as far as it will go, locking the pocket in place and defining the top wings.

Open the wing slightly to reveal the lower layer.

Valley fold under the left wing as well, and flatten the butterfly model.

Create the fold as far back as you can, and crease well.

Mountain fold the butterfly down the center.

The angle of the fold will create a small triangle of negative space between the wings. Lay the wing flat, and do it on the other side.