Apparently cabbage moths damage vegetables and plants in the garden, but can be deterred by placing white, moth shapes on wires, in the pots or flower beds.  Seems nobody told the cabbage moths!  Anyway, it inspired me to make a moving version of the moths sold at our local garden centre.

This is the third version, with a wire as the swivel axis, rather than a pivot through the body. Placing the swivel well ahead of the wings helps the moth to turn into the wind.

UPDATE 1:

Just like a real moth, this one wants to take flight.  The swivel wire can lift out of the dowel socket, setting the moth free.  I found this out after reversing my car over the moth after it dislodged during a windy night.  I have made a new dowel socket (V2) with a groove so the wire swivel can be looped to prevent future escapes.  See the new photo for clarity.  You can also experiment with a different wire swivel layout, with the loop on the other side of the dowel socket to help balance the weight of the moth.

Steps:

1. Print the parts.  I used PLA.  White is an obvious choice, but clear PLA looks very nice too.
2. Use a small bit of filament as an alignment dowel, glue the body halves together.
3. Using the templates or free form bending, cut and bend the wire swivels.  Glue the main wire swivel into the head of the moth.  Check the photos for the orientation. I used wire which seems to be around 1.25mm in diameter, so 16 or 18 gauge.
4. Bend one end of the wing swivel, thread one wing, then the body and finally the second wing onto the wire.  Now carefully bend the other end, taking care not to make the bend too tight, or the wings won't rotate freely.
5. Fit the printed dowel socket onto a 6mm (¼") dowel, then place the free end of the swivel wire into the socket.
6. Push the dowel into the ground, keeping it as vertical as possible, otherwise the moth tends to fall to the low side.

UPDATE 2:

I found that it works well at step 3 above, to hold the wire with pliers, then heat the end that has to go into the head.  Press it into the opening on the head and turn the body to align it before the PLA hardens again.  I added a drop of superglue and let it wick into the head, after the wire had cooled.