write2kill.in | Select writings of Subir Ghosh
 
 
  • Sharebar

Tiny 100-gram bird flies 27,000 km - twice

Tiny flier: Ruddy Turnstone 9Y photographed in Taiwan on May 11, 2009 after departing south-east Australia on April 27. Photo: BirdLife International

A tiny bird that weighs less than 100 grams has completed a 27,000 km round trip migration for the second time. This is the first time a wader has been tracked with a geolocator on its complete migration in successive years.

The bird in question was a ruddy turnstone (Arenaria interpres), a small wader weighing less than 100 grams which spends the (austral) summer months on many of the beaches around Australia. They are one of the family of waders that migrate huge distances to Siberia in Russia to breed. It was tracked by researchers from the Victorian Wader Study Group, a special interest group of Birds Australia [BirdLife Partner].

The bird had a one gram light sensor data logger (geolocator) attached to its leg. This device recorded where the bird was each morning and evening. In each year the device was attached to the bird in mid April on a beach at Flinders, Victoria, in southeast Australia. Researchers used these data logging devices over the last two years to find out the key stopover locations which are so important for the birds to refuel on their long journey.

“The data retrieved so far shows that the birds generally start their northward migration with an initial nonstop flight of around 7,600km in six days to Taiwan or adjacent regions” Dr Minton said. “There they refuel on the tidal flats before moving north to the Yellow Sea and northern China. They then make a flight of over 5,000kms to the breeding grounds in northern Siberia, arriving in the first week of June.

“One of the interesting findings is that after breeding, the return journey shows considerable variation, no two birds following the same route. Some return through Asia while an amazing alternate route has been demonstrated by these new results. This is a trans-Pacific route where the bird moves east to the Aleutian Islands off southwest Alaska before making the huge journey across the Pacific, stopping only once or twice before reaching Australia in early December.”

The first record of this flight was in 2009 when the bird spent nearly two months in the Aleutians before setting off southward over the Pacific Ocean and making a nonstop flight of 7,800kms to Kirabati before making the 5,000km trip back to Flinders, Victoria. In 2010 the same bird undertook a similar incredible journey, this time stopping off in the Marshall Islands and Vanuatu in the Pacific before returning to Australia.

Turnstones live up to 20 years and such a bird following this 27,000 km trans-Pacific route would have flown over 500,000 kilometres in its lifetime.

Scientists are still puzzling over why individual ruddy turnstones use such widely differing routes for their annual migrations. The study highlights the importance of key regions within the flyway. Scientists are concerned about the ability of these and similar birds to cope with the massive habitat changes occurring as a result of large reclamation and urban development projects.

 
 
 
Daily Newsletter
Enter your email address:

Delivered by FeedBurner
Random Pick: Development
October 15, 2010 | Rich nations sending 'substandard' food to poor countries : Rich nations such as the United States of offloading food it would not feed its own children to poorer countries as food aid, medical charity Medecins Sans Frontieres (MSF) has said. "Foods we would... Continue reading Rich nations sending 'substandard' food to poor countries
Random Pick: Wildlife
September 21, 2010 | 'Extinct' species rediscovered after decades lost to science: Scientists have rediscovered three "lost" amphibian species that had not been seen for decades, Conservation International (CI) and the IUCN Amphibian Specialist Group (ASG) have announced. The three... Continue reading 'Extinct' species rediscovered after decades lost to science
Random Pick: Media
August 14, 2010 | The dam report on tribal peoples that was damned by the media: When skewed concepts of development are the watchwords of the day, it is more than likely that voices against this twisted sense of development don't see the light of day. So when a group that fights... Continue reading The dam report on tribal peoples that was damned by the media
Random Pick: Women
October 3, 2010 | UN report on Congo rapes is stuff horror films are made of: The world played a mute spectator to the Rwandan genocide of Tutsis in the Nineties. It enacted the same role when untold atrocities were being perpetrated in DR Congo. Now that the UN report on DRC... Continue reading UN report on Congo rapes is stuff horror films are made of
Random Pick: Northeast
September 30, 2012 | Conflicting futures: In 1997, the largest and most powerful insurgent group of the Northeast signed a suspension of operations agreement with the Indian government. With the National Socialist Council of Nagalim... Continue reading Conflicting futures
Random Pick: Conflict
September 20, 2010 | Global recession drives down arms sales to lowest since 2005: The amount of deals in the international arms market has dropped drastically in the aftermath of the financial crisis. A new report has concluded that the value of worldwide arms deals in 2009 was... Continue reading Global recession drives down arms sales to lowest since 2005
Random Pick: Human Rights
November 18, 2011 | Manipur police burn down 200 floating huts to clear Loktak: The state government in Manipur is forcefully evicting families living on Loktak. Since Tuesday, the state police has used brute force to chase alleged illegal settlers away from their homes,... Continue reading Manipur police burn down 200 floating huts to clear Loktak
Random Pick: Environment
September 13, 2011 | Vultures still in peril as pharmacies and farmers flout deadly diclofenac ban: Over a third of Indian pharmacies continue to sell diclofenac to livestock farmers. Manufacture and sale of this drug for veterinary use has been banned in India since 2006, because of its toxicity... Continue reading Vultures still in peril as pharmacies and farmers flout deadly diclofenac ban