Map was generated from the coastline data set (except for other sets of line data such as political boundaries or rivers) of "World Data Bank II" retrieved from Online Coastline Extractor[NGDC] provided by National Geophysical Data Center (NGDC). Retrieved data set was processed with my own Java program and therefore no other resources such as data extracting software provided by NGDC were utilized. Adopted method is the Lambert azimuthal equal-area projection with projection center at 45°00′S 175°00′E.
Distribution (Breeding Range):
Whole of each Island or Islands is enclosed by a line except for Fiordland coast and nearby islets of New Zealand's South Island where breeding range is shown by a line. Enclosing or range-showing line width is fixed irrespective of size or density of population.