(１８)
Then fold the big square.
Make a star-shape like this picture.
Then make a bird-base so that wings are connected to wings of small cranes.
(１９)
When making a bird-base, you need to put the tips, which have been circled, close to each other.
At that time, small cranes are easy to get caught on each other.
Therefore, make a bird-base carefully so that the small cranes will not be caught on each other.
(２０)
Also, make a bird-base so that four sets of two small cranes are on the outside of the bird-base.
(２１)
(Reference picture)
This picture is taken after moving one set of two small cranes.
Make a bird-base so that small cranes are on the outside of the bird-base.
(２２)
After making a bird-base, fold the head/tail to the center.
(２３)
Then raise the head/tail carefully so that small cranes are not caught on each other.
(２４)
This picture is halfway through.
(２５)
Raise the head/tail all the way so that a set of two cranes rise like this picture.
(２６)
This picture is taken from the different angle.
(２７)
Then pinch the two corners which have been circled to make creases.
If you try to make creases neatly at parts near connecting parts, the connecting parts will tear.
Therefore, try not to touch the parts near connecting parts.
(２８)
Then fold the other head/tail to the center.
(２９)
After folding the head/tail, raise it.
(３０)
Raise the head/tail all the way so that a set of two cranes rise like this picture.
(３１)
Pinch the two corners which have been circled to make creases as well.
