Illustration of the Norfolk kaka (Nestor productus), an extinct species of large parrot, belonging to the parrot family Nestoridae and the head of Nestor productus. From 'Extinct Birds: an attempt to unite in one volume a short account of those birds which have become extinct in historical times: that is, within the last six or seven hundred years: to which are added a few which still exist, but are on the verge of extinction' by Baron, Lionel Walter Rothschild, published in 1907.