A relative of the Manx shearwater, the Hutton's shearwater is found on the other side of the world and is endemic to NZ. It is only found breeding at 2 locations in that country. The entire world population is in the Kaikoura mountain range at a height of between 1200-1800m, totalling around 114,000 pairs.
I say '2 breeding locations' but there is now hope that a 3rd will become established. The NZ Dept of Conservation (DoC) co-ordinated a project between 2005-2008 taking chicks from the mountain colonies and moving them to a new 'purpose built' colony on the Kaikoura peninsula at sea level. The area has a 'predator proof' fence around it and all predators within the area (rats, stoats etc) were eradicated at the start. It has just been announced that the first chick has hatched at this new location. See the Hutton's Shearwater Charitable Trust website for more details about the project.