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

 

Mohua goes from rare to common in 21 years

8 May 2019



The once rare mohua/yellowhead has for the first time become the most common native bird counted since predator control began in the Landsborough valley in South Westland.

Mohua numbers have risen more than 30-fold and overall, native bird numbers have doubled in the 21 years since monitoring began in 1998, recently analysed Department of Conservation (DOC) results show.

DOC Principal Science Advisor Dr Colin O’Donnell says the long-term study charts the response of 13 native bird species following sustained predator control to suppress rats, stoats and possums.

“Our most recent bird count data from last spring shows seven native bird species are still increasing in numbers, four species remain stable, and two have declined.”

“For the first time in 21 years, mohua have become the most common bird counted, which is what they would have been in this valley prior to European settlement.”

“The results are exciting because year by year we’re seeing a re-balance of the valley’s birdlife and don’t know when population limits will be reached,” says Dr O’Donnell.

Numbers of mohua/yellowhead, tuī, bellbird/korimako, brown creeper/pīpipi, rifleman/tītitipounamu, grey warbler/riroriro andkākāriki/yellow-crowned parakeet have all steadily increased over the last 21 years.

Mohua have gone from just 14 birds to 444 counted in the study area last November.

Kākā, tomtit/ngirungiru, fantail/pīwakawaka and kererū/wood pigeon have remained stable and not declined as they would have been expected to without predator control.

Two species, tautou/silvereye and the migratory long-tailed cuckoo/koekoeā, have declined. For silvereye this could be due to greater competition for nectar from the more aggressive tuī and bellbird.

Long-tailed cuckoo migrates to the Pacific islands each winter and may be being affected by conditions there. It returns to lay its eggs in mohua and brown creeper nests in late spring.

Predator control began in the Landsborough valley in 1994 after the impact of predators on birdlife was observed. Since then, DOC has done valley-wide trapping, and six aerial-1080 operations timed to suppress increasing rodent levels, with the most recent two, in 2014 and 2016, covering the entire valley.

Due to this year’s heavy beech mast the Landsborough is a priority for aerial-1080 predator control. This will take place as part of DOC’s Tiakina Ngā Manu, formally Battle for our Birds programme, which aims to protect vulnerable ecosystems and wildlife at important sites throughout New Zealand.

–Ends–


© Scoop Media

 
 
 
Business Headlines | Sci-Tech Headlines

 

The Narrow Divide: New Poll Shows Tight Political Race For SME Votes

In a major turnaround following nearly a decade of MYOB election polls, Labour is currently the preferred political party of New Zealand’s SMEs, with 38% of SME owners and decision makers intending to vote red in the upcoming General Election, ... More>>

Reserve Bank: Further Easing In Monetary Policy Delivered

Tēnā koutou katoa, welcome all. The Monetary Policy Committee agreed to expand the Large Scale Asset Purchase (LSAP) programme up to $100 billion so as to further lower retail interest rates in order to achieve its remit. The eligible assets remain ... More>>

Retail: Post-Lockdown Retail Card Spending Picks Up

The rise in retail card spending was boosted by sales of furniture, hardware, and appliances, Stats NZ said today. “For a third consecutive month, card spending on the long-lasting goods (durables) remained at higher levels than last year, after ... More>>


Contact: Business Drops, New Generation On Hold

New Zealand’s second-largest energy company Contact Energy (‘Contact’) released its full year financial results for the 12 months to 30 June 2020 (‘FY20’) this morning. More>>

Mining: OceanaGold Announces Receipt Of WKP Mining Permit

MELBOURNE, Australia, Aug. 6, 2020 /CNW/ - OceanaGold Corporation (TSX: OGC) (ASX: OGC) (the 'Company') is pleased to announce it has received the mining permit for Wharekirauponga ('WKP') on the North Island of New Zealand. ... More>>

ALSO:

Economy: COVID-19 Lockdown Has Widespread Effects On Labour Market

In the June 2020 quarter, the seasonally adjusted unemployment rate fell to 4.0 percent, down from 4.2 percent last quarter, while underutilisation rose, Stats NZ said today. More>>

ALSO:

NZ Post: New Research By NZ Post Shows Online Shopping Grew 105% In Alert Level 3

New research by NZ Post into how the COVID-19 response has impacted the way Kiwis shop online, shows online shopping increased 105%* when the country moved into Alert Level 3, and may have changed the way Kiwis shop permanently. Online spend peaked ... More>>

ALSO:

Antarctica NZ: Ice-Olation

Antarctica New Zealand is gearing up for a much reduced season on the ice this year and a very different deployment to normal! Before they head to one of the remotest places on the planet, all personnel flying south with the New Zealand programme will ... More>>

ALSO:

QV Valuations: July House Price Index Illustrates Market Resilience

According to the July 2020 QV House Price Index (HPI) results out today , property values recorded a marginal increase, up 0.2% over the month. This is somewhat of a turnaround from June, after the national index edged 0.2% lower. More>>

ALSO:

Property: Queenstown Rents Experience Biggest Drop In Seven Years

Rental prices in the Queenstown-Lakes district saw the biggest annual percentage drop in seven years after falling 28 per cent on June last year, according to the latest Trade Me Rental Price Index. Trade Me Property spokesperson Aaron Clancy said ... More>>

Seismology: The Quiet Earth

As many daily activities came to a halt during lockdown, the Earth itself became quiet, probably quieter than it has been since humans developed the technology to listen in. Seismologists have analysed datasets from more than 300 international ... More>>

RNZ: James Shaw Says Kiwibank, Not Ministers Should Decide On Investors

Climate Change Minister James Shaw says Kiwibank's decision to stop doing business with companies dealing in fossil fuels is the right one. More>>

ALSO:

FMA: Kiwis Confident Financial Markets Will Recover From COVID-19, Plan To Increase Investments

Despite the majority (60%) of investors experiencing losses as a result of COVID-19, the outlook on investing remains positive, according to a Financial Markets Authority (FMA) survey. Most Kiwis (71%) were optimistic that the pandemic will pass eventually ... More>>

FIRST Union: Warehouse Using Covid For Cover As Extensive Restructure Makes Everyone Worse Off

(FIRST Union comments on The Warehouse consultation and proposed restructure) 'Unfortunately the Warehouse have done the disappointing thing and used Covid-19 to justify a bunch of operational business decisions that will leave hundreds of workers without jobs ... More>>

ALSO: