Window strikes kill hundreds of millions of birds annually in North America alone, making them one of the largest preventable human-caused sources of bird mortality. Simple deterrents can dramatically reduce strike rates.
Window strikes cause immediate death or significant injury to birds that represent preventable suffering on an enormous scale. Birds that survive a window strike are often concussed and vulnerable to predation; those that die experience sudden trauma. The preventability is what makes this particularly important as a welfare issue: simple, inexpensive deterrents applied to home windows can reduce strike rates by over 90%. The barriers to adoption are awareness and aesthetics - many people do not realize windows are a significant bird mortality source, and some deterrents are considered unsightly. Promoting bird-safe window treatments as a normal part of home and building management - like smoke detectors or recycling - requires sustained public education alongside building design standards that incorporate bird safety.