In the 1880s, large numbers of mustelids (stoats, ferrets and weasels) were released in New Zealand to reduce rabbit numbers, but they also preyed heavily on many native species including the kakapo.
Pada tahun 1880-an, sejumlah besar mustelida (cerpelai, ferret dan musang) dilepaskan di Selandia Baru untuk mengurangi jumlah kelinci, namun mereka juga berburu keras terhadap banyak spesies asli seperti Kakapo.