The world's fattest parrot, the critically endangered kakapo, has enjoyed a record-breaking breeding season, New Zealand scientists said Thursday, with climate change possibly aiding the species' unique mating spree. Less than 50 years after the flightless nocturnal bird was thought to have been extinct, at least 75 chicks are expected to survive this year, Andrew Digby, a science advisor to New Zealand's kakapo recovery, operation told AFP.