Safety In Numbers — Why Thousands Of Birds Move As One

Flocks of birds or schools of fish often group together in massive numbers, and move as though they are a single organism with one brain.

The behavior is called a murmuration, and scientists are trying to figure out how — and why — the animals do it.

Paige Pfleger (@PaigePfleger) of Here & Now contributor WHYY went to a landfill in Atlantic County, New Jersey, to observe the phenomenon firsthand.