Complex sentence: All taxa in this genus were thought to be extinct by 1500 in New Zealand, as it is reliably known that the Māori still hunted them at the beginning of the fifteenth century, driving them into sheets and robbing their nests.
Split into simpler sentences: All taxa in this genus were extinct by 1500 in New Zealand. It is reliably known that the Māori still hunted them at the beginning of the fifteenth century, driving them into sheets and robbing their nests.