Dinornis robustus

The South Island giant moa, a huge flightless bird endemic to New Zealand. Females of Dinornis stood among the tallest birds ever known, being able to stretch their heads up to around 3.5 meters (12 feet) and tipping the scales at 250 kg (500+ pounds). In the opposite pattern often observed in mammals, the males were only half as tall and maybe a third the weight of females. Dinornis survived on the South Island until human hunting drove it to extinction around 1400 AD.