"It was like a horror movie."
Tim Pohl watched more than 100 birds drop out of the sky Monday.
“I’ve never seen this before,” Pohl told the Duluth News Tribune.
Pohl, a contract employee of 12 years at Minnesota Power in Duluth, witnessed flocks of Bohemian waxwings fall to the ground outside his workplace after they flew into tinted glass partitions.
More than 30 birds died.
"Their wings were straight out, twitching. They were on their backs. I would hold them for a second, then put them on the ground," Pohl said.
Two factors contributed to the die-off. A rehabilitator at Wildwoods, a wildlife rehab center, told the newspaper that the Minnesota Power building in downtown Duluth is on a major migration route and birds can get faked out by tinted glass.
A spokesperson for the company says they plan to put stickers on the panels to help avoid this in the future.
The birds may have also been disoriented by eating fermented berries, the newspaper reports.