The kakapo, a nocturnal and flightless bird from New Zealand, is the world’s heaviest parrot, saved from the brink of extinction through dedicated conservation efforts.

The Andean condor is the world's biggest bird of prey, which can weigh up to 15 kg and has a wingspan of up to 3.3 meters.

Forbes contributors publish independent expert analyses and insights. I write about biodiversity and the hidden quirks of the natural world.

The ostrich, the world’s largest bird, is indigenous to Africa, where ranchers have raised it for commercial purposes for more than a century. A decade ago, entrepreneurs thought that southeastern ...