In fact, as many as 600 million birds die in window collisions in the U.S. and Canada every year, scientists estimate. [...]

A growing awareness of the threats to bird populations has prompted new laws and voluntary guidelines in cities from Toronto to San Francisco. Along with "green" building programs, these new rules are spurring demand for bird-friendly glass among architects, glass manufacturers, and their clients. — news.nationalgeographic.com

Retrofitting their home to eliminate feathered fatalities has worked for Brophy and Lutz. But a growing chorus of bird enthusiasts are advocating avian-friendly architecture at the design stage as the best prevention. It's a national movement that started in Chicago and has spread to other major cities, including the Twin Cities. — startribune.com