Surprise and curiousity

Wonder what the big leaf on the fence is in this photo...

https://homes.yahoo.com/photos/america-s-healthiest-cities-1398877476-slideshow/

1. Holland-Grand Haven, Mich.
> Physical Health Index: 80.9
> Obesity rate: 23.4% (44th lowest)
> Blood pressure: 23.9% (17th lowest)
> Poverty rate: 11.3% (37th lowest)

From America's Healthiest Cities...