Bird or Squirrel Door Stop, Cast Iron, Antique Brown. Antique rusty-brown cast iron door stop bird. Perfect for placement against any doors–inside or outside.. No more slamming doors, thanks to this functional cast iron doorstopper in the shape of a bird. Due to its wedge shaped design this item will wedge itself tight under door or window. This decorative cast iron door stopper has been hand cast according to centuries old tradition and workmanship.