Simon Wong: The strange and powerful mating calls of the giant flightless parrot of New Zealand, the Kakapo. There are only 86 of them left in the world.

• 新西兰的枭鹦是一种不能飞的巨大鹦鹉，它求偶时会发出很奇特很大声的交配鸣叫，现在全世界只有86只存活的枭鹦。