Angry bees not angry birds delayed a Delta flight for close to an hour after the swarm took hold of one wing of the plane. An estimated 10,000 honey bees had decided to call the wing home.

the bugs were discovered as the plane was being readied for fuel.

A local bee handler, Stephen Repasky had to be brought in because honey bees are a protected species and killing them was not an option. Repasky believes that “There is likely a colony of wild bees located within the Pittsburgh airport grounds.”

This is not the first time that a swarm of honey bees has delayed a flight at the Pittsburgh airport. In 2011, a swarm of 25,000 bees had to be removed from a light pole on the runway.