What is roundest bird?

The roundest bird is the kakapo (Strigops habroptilus), which is a flightless parrot that is endemic to New Zealand. The kakapo has a distinctive plump and rotund body shape, which is due to its large amount of body fat that is used for energy storage and insulation. This bird is considered critically endangered, with only about 200 individuals remaining in the wild, due to habitat loss and predation by introduced mammals. Conservation efforts are underway in New Zealand to protect and increase the population of this unique and endearing bird.