Video | Business Headlines | Internet | Science | Scientific Ethics | Technology | Search

 


Did small kiwi fly from Australia?


St Bathans Fauna. Illustration: Peter Schouton

Media Release

16 December 2013

Did small kiwi fly from Australia?

The kiwi, the iconic New Zealand flightless nocturnal bird, is not a dwarf version of a distant ancestor but more likely evolved from a tiny bird that could have flown from Australia, according to an Australian and New Zealand palaeontologists.

The findings of a study just published in the Proceedings of the 8th International Meeting of the Society of Avian Palaeontology and Evolution reveal the evolutionary pathway of the kiwi, overturning a commonly held theory championed by the late eminent evolutionary biologist Stephen Jay Gould.

Dr Trevor Worthy, of Flinders University in Adelaide, and a team from New Zealand’s Canterbury Museum and Te Papa Tongarewa The Museum of New Zealand discovered the fossil three years ago at St Bathans in New Zealand’s Central Otago.

Dr Worthy said the study results are supported by the genetic evidence that the kiwi is related to the Australian emu and not the New Zealand moa, an enormous emu-like bird that became extinct some 700 years ago.

“One of the distinguishing attributes of the kiwi is that it lays an enormous egg, which is about a quarter of the bird’s body weight and occupies most of the bird,” said Dr Worthy, an internationally-recognised expert on the moa.

“Gould’s 1986 essay, which sought to explain the origins of the kiwi egg’s size, promoted the idea that the kiwi was highly derived from a large moa-like ancestor, and had shrunk in size while retaining the egg size of this ancestor,” he said.

Dr Paul Scofield of Canterbury Museum said “This fossil from the early Miocene, about 20 million years ago, shows us that it’s a tiny bird about one third of the size of a small kiwi today. It suggests the opposite is, in fact, the case – that the kiwi has developed towards a larger size, a trend that is seen in many birds from the early Miocene.

“And if, as the DNA suggests, the kiwi is related to the emu, then both shared a common ancestor that could fly. It means they were little and had wings, and that they flew to New Zealand.”

Dr Worthy said it was not uncommon for birds to “jump” from Australia to New Zealand, citing the Mallard duck, the little banded dotterel and the cattle egret as three species which regularly fly back and forth.

“We need to find wing bones to put the theory beyond all doubt,” Dr Scofield said.

The researchers plan to continue excavations at St Bathans this summer. This research was funded by The Australian Research Council, The Mason Foundation and the R.S. Allan Fund.

© Scoop Media

 
 
 
 
 
Business Headlines | Sci-Tech Headlines

 

Media: Julian Wilcox Leaves Māori TV

Māori Television has confirmed the resignation of Head of News and Production Julian Wilcox. Mr Maxwell acknowledged Mr Wilcox’s significant contribution to Māori Television since joining the organisation in 2004. More>>

ALSO:

Genetics: New Heat Tolerant Cow Developed

Hamilton, New Zealand-based Dairy Solutionz Ltd has led an expert genetics team to develop a new dairy cow breed conditioned to thrive in lower elevation tropical climates and achieve high milk production under heat stress. More>>

Fractals: Thousands More Business Cards Needed To Build Giant Sponge

New Zealand is taking part in a global event this weekend to build a Menger Sponge using 15 million business cards but local organisers say they are thousands of business cards short. More>>

Scoop Business: NZ Net Migration Rises To Annual Record In September

New Zealand’s annual net migration rose to a record in September, beating government forecasts, as the inflow was spurred by student arrivals from India and Kiwis returning home from Australia. More>>

ALSO:

Scoop Business: Fletcher To Close Its Christchurch Insulation Plant, Cut 29 Jobs

Fletcher Building, New Zealand’s largest listed company, will close its Christchurch insulation factory, as it consolidates its Tasman Insulations operations in a “highly competitive market”. More>>

ALSO:

Scoop Business: Novartis Adds Nine New Treatments Under Pharmac Deal

Novartis New Zealand, the local unit of the global pharmaceuticals firm, has added nine new treatments in a far-ranging agreement with government drug buying agency, Pharmac. More>>

ALSO:

Crown Accounts: English Wary On Tax Take, Could Threaten Surplus

Finance Minister Bill English is warning the tax take may come in below forecast in the current financial year, as figures released today confirm it was short by nearly $1 billion in the year to June 30 and English warned of the potential impact of slumping receipts from agricultural exports. More>>

ALSO:

Get More From Scoop

 
 
Standards New Zealand

Standards New Zealand

Mosh Social Media
 
 
 
 
 
 
 
 
Sci-Tech
Search Scoop  
 
 
Powered by Vodafone
NZ independent news