The Kakapo of New Zealand is a kind of parrot, but one that doesn’t fly. At five pounds, it’s the world’s heaviest parrot. And like many parrots, it’s long-lived -- up to 90 years. Still, the species is highly endangered. These odd parrots evolved in an island world that lacked terrestrial predators. But all that changed when humans and their animals arrived. Now Kakapos are mostly consigned to a conservation recovery program on small islands that are free of predators.