Me pēnei te tohu i te whārangi:
Gerard Hutching and Carl Walrond, 'Ngā whakaahua, ngā rauemi katoa', Te Ara - the Encyclopedia of New Zealand, http://www.TeAra.govt.nz/mi/threatened-species/media (accessed 19 March 2024)
He kōrero nā Gerard Hutching and Carl Walrond, i tāngia i te 24 Sep 2007