Wildlife and Habitat Conservation News reported on the threat of house windows to birds. Birds can mistake windows for openings and crash into them flying at full speed. In Canada it is believed that crashes into house windows results in 22 million bird death annually. This number does not include birds who die from crashing into commercial buildings. Most common victims of these crashes are common birds such as sparrows, robins and chickadees.
Crashes are greatly reduced by putting stickers on windows or placing objects in windows to break up the reflections. This takes away the illusion of an open space.
Read more at: Wildlife and Habitat Conservation News: House Windows are a Threat to Birds.
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Natural History Wanderings 
The birds are always crashing into our cabins windows. You have some good solutions. One day a hawk flew into my house through an open door, I had a house that was mainly windows. I open all the doors in the house, and it chose its exit safely!
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By: D. A. Hartley on January 29, 2013
at 12:08 AM