Effects on birds no relation light pollution
Effects on birds
The light pollution from Tribute in Light has caused confusion for over a million migrating birds, trapping them in the beams. Even at an altitude of several miles, birds can be affected by the lights. As a result of this effect, the beams are switched off for 20-minute periods to allow the birds to escape. To ensure the lights do not affect migrating birds, the Municipal Art Society works with the New York City Audubon on the illumination. A 2017 study found that the installation "dramatically altered multiple behaviors of nocturnally migrating birds—but these effects disappeared when lights were extinguished".
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