NanaWall Systems Bird-Protection Ornilux Glass Designed to help reduce the number of birds colliding into windowswhich is estimated to kill between 100 million and 1 billion birds per year in the United States, according to NanaWallBird-Protection Ornilux Glass contains ultraviolet patterns that make it visible for birds but allow it to remain transparent to the human eye. Created by German manufacturer Arnold Glas, the glass is compatible with all of NanaWall’s folding and sliding glass systems and its all-glass window-wall systems.; 800.873.5673.