Step 1:
This is the front of the paper. Prefold over these lines.

Step 6:
Press the edges indicated by the arrows downwards.

Step 5:
Pull the end at the bottom of the arrow upwards by making a valley-fold over the green line.

Step 2:
First make a valley-fold over the 2 lines at the bottom-right. Then make a mountain-fold over the 2 lines in the middle. And make a valley-fold over the 2 lines at the top left.

Step 4:
Unfold the folds of step 3

Step 3:
Make a valley-fold over these 2 lines.

Step 10:
Make a valley-fold over these lines. Make the same folds on the other wing.

Step 8:
Make an inside reverse fold over these 3 lines. The pieces indicated by the arrows are pulled towards each other while you make these folds.

Step 9:
Repeat step 8 on this end, see arrow.

Step 7:
Repeat steps 3 to 6 on the backside of the model.

Step 16:
Fold the wing downwards over this (prefolded) line, do the same on the other wing.

Step 15:
Make a mountain-fold over this line.

Step 12:
Make a mountain-fold over this line, make the same fold on the other side of the tail.

Step 11:
Make a valley-fold over the line on the right and  a mountain-fold over the line on the left. Make the same folds on the other side of the neck. Make these folds halfway the neck, see arrows as guidance.

Step 14:
Make a mountain-fold over this line, make the same fold on the other side of the neck.

Step 13:
Press the tail flat between your fingers, see arrows.