Hundreds of migrating birds have died this week in New York City after crashing into glass skyscrapers, according to local organisation NYC Audubon.
On Tuesday morning, 14 September, a volunteer at the NYC Audubon found over 200 dead birds dotted on pavements around the 3 World Trade Center and 4 World Trade Center skyscrapers alone.
By the end of her shift at the World Trade Center site, volunteer Melissa Breyer said she found 226 carcasses, though many more were "inaccessible, or too mangled to collect".
"When you have 226 dead window-struck migratory birds from one morning, it's hard to get them all in one photo," she wrote on Twitter.

Some of the 226 dead birds I picked up this morning while window collision monitoring for @NYCAudubon. 205 from @3NYWTC and @4WTC alone. Many others swept up, inaccessible, or too mangled to collect. 30 injured to @wildbirdfund. If you?re in NYC today, be careful where you step. pic.twitter.com/RTjm82NIpy ? Melissa Breyer (@MelissaBreyer) September 14, 2021

That day, the Wild Bird Fund rehabilitation centre in New York also received more than 70 injured birds, including 30 found by Breyer.
City lights and glass facades to blame
A combination of stormy weather and artificial night-time lighting in cities are to blame for Tuesday's mass bird death, reported the Audubon network.
This is because both city lights and storms can confuse birds in nocturnal flight, leading to exhaustion from disorientation and in turn, build...