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- Puffinus gavia
31-36 cms, wingspan 75cms
Blackish-brown upperparts, extending to below eyes on head. White underparts. Variable greyish underwings, but generally more pale than Hutton's. Undertail and underwing coverts white. Legs and feet pink.
Similar to Hutton's Shearwater.
Breeds on islands off the New Zealand's North Island and Cook Strait, plus in Marlborough Sound.
Juveniles and non-breeders travel to south-eastern Australia (April-Setember in Queensland, July to November further south), New Caledonia and Vanuatu. May stay for 2 years.
Can be very social at sea, both within the breed and with others.
In flight, has bursts of rapid wing beat, followed by short glides.
- Clements, J. F., T. S. Schulenberg, M. J. Iliff, B.L. Sullivan, C. L. Wood, and D. Roberson. 2013. The eBird/Clements checklist of birds of the world: Version 6.8., with updates to August 2013. Downloaded from http://www.birds.cornell.edu/clementschecklist/download/
- The Slater Field Guide to Australian Birds
- Ocean Wanderers website 
- BirdForum Opus contributors. (2021) Fluttering Shearwater. In: BirdForum, the forum for wild birds and birding. Retrieved 27 January 2021 from https://www.birdforum.net/wiki/Fluttering_Shearwater