New Delhi, June 20 -- In recent weeks, hundreds and thousands of bees have buzzed through Midtown Manhattan, clustering around light poles and even clinging to sidewalk scaffolding. Despite how "fascinating and terrifying" such swarms may look, experts say they're usually not dangerous.

Multiple social media posts and videos this week captured the "biblical" swarms. "It's a fascinating and terrifying experience," said Nick Rozak, head beekeeper at the nonprofit Bee University NYC, was quoted by the New York Post as saying.

He further described the incidents as: "You're standing there, and there's 20 or 30,000 bees in a tornado flying through Midtown Manhattan. It's definitely going to make people pay attention."

A New York University s...