Windows: an unintended fatal hazard for birds. In Connecticut State of the Birds 2007. Connecticut Audubon Society, Fairfield, CT, pp. 7-12. Daniel Klem, Jr., 2007

With the exception of habitat destruction, a vast amount of evidence, primarily collected over the past 35 years, indicates that clear and reflective sheet glass causes the unintended deaths of more birds worldwide than any other human-related avian mortality factor. This article provides an overview of the harmful relationship between wild birds and the glass they encounter in human-altered environments, whether urban, suburban, or rural.

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