Would Leonardo be proud?

     In 2007 I visited a museum in Venice, Italy of the works of Leonardo da Vinci.  One which intrigued me in particular is shown in the first photo.  I though it would be a good feature in my gardens, so I built some.  Foolishly, I never measured it at the museum, so I had to guess at the dimensions.  The first one was "too fat," the next "too skinny."  The last one was pretty close to his scale, and it is shown in photos 2-4.  It is made of cedar.
     The "skinny" one, painted black, is shown hanging in a tree.  Actually, I made two of these.
     Finally, the "fat" one can be seen in the last photo on the right side.