Many people seem to be unaware that reflective glass is a serious hazard to migrating birds.
Through reflection, it can duplicate the sky or trees and, thus, cause the migrant to feel it is flying straight ahead into a safe area when it is actually heading for probably a fatal collision. Having dead birds at a business or apartment entrance, or at a location where employees or customers walk or take meals, naturally gives an unfavorable appearance to any establishment and is one an owner would like to avoid. We know of some businesses that have done just that. The silhouettes are attractive and inexpensive. An alternative, obtainable from the same sources but more useful for smaller areas like picture windows, is placing decals of chickadees, the hawks or other subjects on the windows.