Birds are less likely to fly into windows if they can perceive ... tape can create effective barriers while maintaining aesthetic appeal. Placing screens or netting on the exterior of windows ...

Hwang temporarily applied patterns to the windows of the Sullivan Center in Chicago, ostensibly to deter birds from flying into the glass, but also to add aesthetic interest to the material itself.

He believes the issue of bird-window collisions has important implications for the cultural aesthetic of transparency overall. "Transparency has really been a key concept for modern architecture ...

In other cases, birds are stunned by the collision and eventually fly off, but many of those individuals also eventually perish from brain swelling. Other injuries, to wings or legs, for example ...