Genus Traversia

Traversia lyalli - It is the best known of the extremely few flightless passerines known to science , all of which were inhabitants of islands and are now extinct. The others were relatives of Xenicus and the Long-legged Bunting from Tenerife, all of which were only discovered recently and became extinct in prehistoric times. In addition, the Bush Wren and the Chatham Islands Fernbird were largely flightless.