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Extended Birdbase

Thanks to Joshua Koppel who is the designer of this base for letting me show the diagrams here. With the help of his base I was able to create some nice new models.



Start with a square sheet of paper.


Step 01

1. Prefold in halfes and along the diagonals in both directions (Valley and Mountain).

Step 02

2. Valley fold the corners to the middle.

Step 03

3. Valley fold the corners to the middle.

Step 04

4. This is what you should get. Open up the model again.


Step 05

5. Valley fold the two sides to the middle.

Step 06

6. Open the model and make the two valley folds simultaneously. Flatten the model along existing creases.

Step 07

7. Repeat step 6 on the lower half.


Step 08

8. This is what you should get. Turn the model around.


Step 09

9. Valley fold the center square in half along the diagonal.

Step 10

10. Swing the flap over.


Step 11

11. Squash fold along existing creases.

Step 12

12. Swing two flaps over.


Step 13

13. Squash fold along existing creases.

Step 14

14. (View enlarged and rotated) Inside reverse fold to the middle.

Step 15

15. Swing one flap over.


Step 16

16. Inside reverse fold to the middle.

Step 17

17. Swing the flap back and turn the model around.


Step 18

18. Swing one flap to the left.


Step 19

19. Repeat Steps 14-17 on this side.


Step 20

20. Squash fold along existing creases.

Step 21

21. This is what you should get. Repeat Step 20 on the other three flaps.


Step 22

22. Petal fold the flap down.

Step 23

23. This is what you should get. Repeat Step 22 on the other three flaps.


Step 24

24. The finished extended birdbase. You should have the same number of flaps on both sides.



Starting from the extended birdbase you can create the following models: