The origami warbler is a traditional origami that is easy to make.
Fold the top point down to meet the bottom, then unfold.
Then fold corner A to the right to meet corner B. Next, fold corner A back to the left, so that it overlaps the left edge of the piece by about half a centimeter.
Now fold corner C down to meet corner D. Then valley fold along the to form one wing:
Repeat on the backside to form the other wing, and your origami bush warbler is complete. You can draw eyes or use stickers to add some realism.