$Phoebastria nigripes reischekia Mathews,1930,Bulletin of the British Ornithologists' Club,51,p.29. (New Zealand).
marine & pelagic,rarely approaching land except at colonies;breeds on oceanic islands with low vegetation or none.
"Most eggs are laid in Nov-Dec,hatch in Jan-Feb,and most chicks fledge in Jun-July"
Disperses over much of North Pacific Ocean after breeding,as far north as Bering Sea & eastwards to Pacific coast of North America.Most numerous on west side of North Pacific with large numbers off east Japan.