This was something new. The glass was hard enough to photograph through but now...
We've treated the glass here to make it as visible as possible for birds.
As many as 100 million to one billion birds die each year in North America after colliding with glass. We have been carefully monitoring this issue at the Zoo, and are committed to finding a safe solution to protect our migratory birds.
To find out how you can reduce bird strikes at your home or office, go to nationalzoo.si.edu/goto/BirdStrike .