An endangered New Zealand kiwi that survived a buffeting in its egg during this month's 7.0-magnitude earthquake has hatched safely.

Richter, named after the now-defunct scale used to measure earthquakes, hatched on Sunday at the Willowbank Wildlife Reserve in Christchurch.

"Our first egg hatch this year is one breakage that is a welcome relief after the recent quakes," conservation minister Kate Wilkinson said.

The ground-dwelling kiwi, the avian symbol of New Zealand, is threatened by a host of introduced predators including rats, cats, dogs, ferrets and possums.

Department of Conservation spokesman Rory Newsam said there were fewer than 70,000 kiwis left in New Zealand and the rowi, the sub-species to which Richter belongs, numbered only 300.

Mr Newsam said Richter's egg rolled around in its incubator during the September 4 earthquake but rubber matting prevented any damage.

He said the chick would be taken to a small island sanctuary until it was about one year old and better able to defend itself, then released into a wildlife protection area on the South Island.

- AFP