Step 1:
Turn the paper

Step 2:
Prefold over these 4 lines

Step 3:
First valley-fold over the 2 lines at the bottom right.
Then mountain-fold over the 2 diagonal lines in the
middle. And valley-fold over the 2 lines at the top left.

Step 4:
Valley-fold over these 2 lines.

Step 5:
Unfold the folds of step 4

Step 6:
Valley-fold the tip at the bottom of the arrow upwards

Step 7:
Push/press the edges downwards/flat

Step 8:
Valley-fold the flap downwards

Step 9:
Repeat step 4 to 8 on the backside

Step 10:
Open the model, see arrow

Step 11:
Make an inside reverse fold over these 3 lines

Step 12:
Repeat step 11 on the left.

Step 13:
Turn the model, so the eyes face upwards.

Step 14:
Make an outside reverse fold over the 3 red lines.
Fold the model in half over the yellow line while
you do this.

Step 15:
Make the same fold on the other side

Step 16:
Make the same fold on the other side

Step 17:
Valley-fold over the line on the right and
mountain-fold over the line on the left.
Make the same folds on the other side.

Step 18:
Open the model, see arrow

Step 19:
Make an inside reverse fold over these 3 lines.

Step 20:
Repeat step 19 on the other leg, see arrow.

Done!                                                                        
                                                                        

This video has instructions for the Cartoon Bird: