Hundreds of migrating birds crashing into NYC skyscrapers

NEW YORK — Hundreds of birds migrating through New York City this week died after crashing into the city’s glass towers, a mass casualty event spotlighted by a New York City Audubon volunteer’s tweets showing the World Trade Center littered with bird carcasses.

This week’s avian death toll was particularly high, but bird strikes on Manhattan skyscrapers are a persistent problem that NYC Audubon has documented for years, said Kaitlyn Parkins, the group’s associate director of conservation and science.

Stormy weather Monday night into Tuesday contributed to the deaths, she said.

“We had a big storm and sort of weird weather and lots of birds, and that’s sort of the perfect combination that can lead to bird-window collisions,” Parkins said.

“It seems that the storm might have brought the birds in lower than they would have otherwise have been, or just disoriented them,” Parkins added. “The effects of nocturnal light on birds is also quite strong, especially when it’s a cloudy night.”

Volunteers with NYC Audubon document bird deaths at high-risk spots during the spring and fall migrations.

Melissa Breyer, the volunteer who tweeted about finding nearly 300 birds on sidewalks surrounding the new World Trade Center towers, said the experience was “overwhelming.”

“As soon as I got to the buildings, the birds were everywhere on the sidewalk,” Breyer said. “Looking north, covered, south, covered, west, covered, the sidewalks were literally covered with birds.”

NYC Audubon wants the owners of the World Trade Center towers and other buildings to help reduce the number of bird strikes by dimming the lights at night and by treating glass to make it more visible to birds.

“Make it so that they can see it and recognize that it’s a solid barrier that they cannot fly through,” Collins said.

Jordan Barowitz, a spokesperson for the Durst Organization, co-developer of One World Trade Center, said in an email, “The first 200 feet of One WTC are encased in glass fins that are nonreflective. This design was chosen because it greatly reduces bird strikes.”