(６５)
Make mountain-folds on the dotted lines.
(６６)
Make mountain-folds like this picture.
On the other six creases, make mountain-folds as well.
(６７)
After making mountain-folds, it looks like this picture.
The parts that have been circled would be swollen.
Push the parts from top to make creases.
(６８)
Make creases like this picture.
(６９)
This picture is taken from the back side.
(７０)
Then make a valley-fold a little on the dotted line.
(７１)
Make a valley-fold a little like this picture.
(７２)
Then move the circled edges so that the circled edges are under wings of an uncompleted crane.
(７３)
Move them like this picture.
(７４)
Then make a valley-fold on the dotted line again.
Proceed with the next steps while making the valley-fold.
(７５)
Put the part, which you have made the valley-fold, between a head/tail of an uncompleted crane.
(７６)
Put the part between the head/tail of the uncompleted crane like this picture.
Then turn the paper over as it is.
(７７)
After turning the paper over, put the other part between a head/tail of the uncompleted crane in the same way.
At that time, move the circled edges so that the circled edges are under wings of the uncompleted crane.
(７８)
Put the part between the head/tail of the uncompleted crane like this picture.
(７９)
Check that each part of a bird-base is put between a head/tail of the uncompleted crane.
In the state of that, pinch the circled parts in the direction of the arrows to make creases.
(８０)
After making creases, it looks like this picture.
(８１)
Then pinch the back of a bird-base to make creases.
(８２)
Make creases like this picture.
(８３)
Then move both sides in the direction of the arrows.
(８４)
You would not be able to raise both sides all the way.
Therefore, raise them until the height like this picture.
