Collisions with glass claim the lives of a billion birds a year in the United States alone. It is second only to domestic cats as a source of mortality linked directly to humans. Birds that have successfully flown thousands of miles on migration can die in seconds on a pane of glass. Glass is as dangerous for strong, healthy breeding birds as it is for sick, weak, or young birds. It is an indiscriminate killer with a serious impact on bird populations. This presentation will discuss why glass is a problem for birds, differences in vision between birds and humans, identify the best practices and options in preventing bird collisions, inform about legislation regarding bird friendly building standards, and offer affordable resources to prevent bird collisions at home, at work and for new building design.