October, 2, 2019 – Many mornings when Luis Bautista gets to work, he sweeps up dead birds.  At the start of his 7 a.m. shift cleaning outside Brookfield Place in Lower Manhattan, it’s not unusual for him to find one or two bird carcasses at the base of the upscale mall’s glassy exterior. Sometimes, he disposes of four in a day, he said.  When Bautista began the job earlier this year, he asked his co-workers about the grim task.  “When I first came in, I seen them. I’m like, ‘Yo, why are all these dead birds around here?’” he said. “They told me they hit the glass and they fall and die.”  It’s a common problem in New York City — and anyplace birds fly near transparent glass, experts said.  “Everybody’s heard or seen this happen,” said Christine Sheppard, director of the Glass Collisions Program at the American Bird Conservancy. “And most people think it’s rare.”