Kakapo low. Supplementary feeding affects the sex ratio of kakapo offspring, and can be used to increase the number of female chicks by deliberately manipulating maternal condition. During the winter of 1981, only females lighter than were given supplementary feeding to avoid raising their body condition, and the sex ratio results in 1982 were close to parity, eliminating the male-biased sex ratios in the unrestricted feeding. Today commercial parrot food is supplied to all individuals of breeding age on Whenua Hou and Anchor. The amount eaten and individual weights are carefully monitored to ensure that optimum body condition is maintained. Kakapo
Kakapo released in New Zealand to reduce rabbit numbers, but they also preyed heavily on many native species including the kakapo. Other browsing animals, such as introduced deer, competed with the kakapo for food, and caused the extinction of some of its preferred plant species. The kakapo was reportedly still present near the head of the Whanganui River as late as 1894, with one of the last records of a kakapo in the North Island being a single bird caught in the Kaimanawa Ranges by Te Kepa Puawheawhe in 1895. In 1891, the New Zealand government set aside Resolution Island in