The biggest birds today are the ostrich and Australia’s emu. Ostriches can be 2.7m tall and weigh 140kg! In the past, some birds were even bigger. Some of them, called moa, lived in New Zealand. One species of moa could grow to more than 3m tall and weigh a whopping 250kg! Moa went extinct about 600 years ago, soon after humans first made it to New Zealand.
