$Puffinus [puffinus] opisthomelas Sibley & Monroe,1990,Distribution and Taxonomy of Birds of the World,p.326..
Marine. More frequent than other shearwaters in inshore waters,frequenting small bays and harbours. Only pelagic during migration.Breeds on coastal islands,occupying slopes,cliffs and rocky beaches,often with grass,shrubs or trees.
"Broadly Aug-Feb.,but no precise data.Laying end Sept-early Oct." (HANZAB,1,p.653)
Partial migrant. Adults apparently fairly sedentary. Immatures cross Tasman Sea to winter off Southeast Australia,where some may stay over the summer.Rarely occurs east to Chatham Islands.