Bird–window collisions
Problem in urban areas / From Wikipedia, the free encyclopedia
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Bird–window collisions (also known as bird strikes after the aviation term or as window strikes) are a problem in both low- and high-density areas worldwide. Birds strike glass because reflective or transparent glass is often invisible to them.[1] It is estimated that between 100 million and 1 billion birds are killed by collisions in the United States annually,[2] and an estimated 16 to 42 million birds are likewise killed each year in Canada.[3]