"Chatham Islands (Okawa Pt)". BirdLife data zone: Important Bird Areas. BirdLife International. 2012. Archived from the original on 10 July 2007. Retrieved 16 November 2012.
"Chatham Islands (Okawa Pt)". BirdLife data zone: Important Bird Areas. BirdLife International. 2012. Archived from the original on 10 July 2007. Retrieved 16 November 2012.