Notes: Small brown & white, w. dusky 'arm-pit' unlike
slightly smaller Fluttering
Shearwater,
which also has a slightly shorter bill. Dark marks on
greater primary coverts. Usually diffuse
dark collar. Flight usually low
to water. Often in flocks, small to huge; peak Feb–Mar, Aug–Sep.
Breeds mountains of S NZ Aug–Apr, migrates to N coast WA. Waters
of continental shelf.