Why Are There Flightless Birds?

30/09/2025

Listen "Why Are There Flightless Birds?"

Episode Synopsis

The ability to fly seems to define birds. But there are more than 50 species of flightless birds throughout the world — from the Ostrich and Kiwi to flightless rails, ducks, and this Humboldt Penguin. Why did they evolve the inability to fly? Many dwelt on islands. Others evolved until they were