This 1987 article in Notornis on Aucklands largest Little shag colony (80-120 birds) is interesting as the colony slowly declined and has been lost for unknown reasons. With permission from the owner I have scanned in the authors (Michael Taylor) seven notebooks and uploaded them here for further study.
Little shag colony-Hobson Bay-Michael Taylor 1.pdf
Little shag colony-Hobson Bay-Michael Taylor 2.pdf
Little shag colony-Hobson Bay-Michael Taylor 3.pdf
Little shag colony-Hobson Bay-Michael Taylor 4.pdf
Little shag colony-Hobson Bay-Michael Taylor 5.pdf