Featured Research

from universities, journals, and other organizations

Why have white storks stopped migrating?

Date:
February 27, 2013
Source:
University of East Anglia
Summary:
A new project to find out why storks are changing their migratory patterns has been launched. In folklore, storks’ strong white wings would carry babies to parents around the world. But since the mid 1980s increasing numbers of storks have stopped their annual migration from Northern Europe to Africa for the winter. Instead, many are living in Spain and Portugal the whole year round – feeding on ‘junk food’ from rubbish dumps.

In folklore, storks’ strong white wings would carry babies to parents around the world. But since the mid 1980s increasing numbers of storks have stopped their annual migration from Northern Europe to Africa for the winter. Instead, many are living in Spain and Portugal the whole year round – feeding on ‘junk food’ from rubbish dumps.
Credit: Image courtesy of University of East Anglia

A new project to find out why storks are changing their migratory patterns has been launched by the University of East Anglia. In folklore, storks' strong white wings would carry babies to parents around the world. But since the mid 1980s increasing numbers of storks have stopped their annual migration from Northern Europe to Africa for the winter.

Instead, many are living in Spain and Portugal the whole year round -- feeding on 'junk food' from rubbish dumps.

The project will track 15 adult white storks for a year using GPS loggers to investigate why they have changed their migratory behaviour. Researchers will investigate the link between climate change and feeding habits to predict future distribution of the species.

The birds have been caught in Portugal and tagged with loggers which will transmit five positions every day. This data will allow researchers to track the storks' movement between roosting and feeding areas and detect long and short distance flights.

Each tracker will also collect information about how much time the birds spend with their heads down, foraging for food.

Dr Aldina Franco, from UEA's school of Environmental Sciences, is leading the project.

She said: "These birds have changed their behaviour very radically. The number of storks spending their winter in Portugal has increased hugely from around 1,180 birds in 1995 to more than 10,000 in 2008 and numbers continue to grow."

"We know that instead of migrating to Africa for the winter, the storks feed on rubbish dumps which provide an abundant and reliable food supply. They're a very opportunistic and adaptable species so the availability of this 'junk food', is a likely cause. By tracing their movements, we will look at how important these rubbish dumps are for white storks in the wintering and breeding season.

"They are also breeding in new areas in the north of the country -- and we think this may be because the climate has changed to become more suitable for them. So climate change is another likely factor.

"Some birds seem to move much more than others and some use rubbish dumps more frequently than others. We will watch to see if they all decide to breed in Portugal or if some will leave Portugal to breed elsewhere in Europe."

Because the data will be transmitted through GSM or mobile phone technology, the scientists will be able to track the storks' movements while sitting comfortably in their offices at UEA.

"With so many migrants in decline, trying to understand how and why they are staying in one place is an important step forward in trying to understand what their long term future may be.

Nathalie Gilbert is a PhD student working on this project and she is interested in understanding the effects of landfill sites on the white stork's productivity and distribution.

She said: "Landfill sites in Portugal are scheduled to be gradually replaced by new facilities where food waste is handled under cover. This will cause a problem for the storks as they will have to find an alternative winter food supply. It may well impact on their distribution, breeding location, chick fledging success and migratory decisions."

The research is being carried out in collaboration with Dr Phil Atkinson from the British Trust for Ornithology (BTO) and researchers in Portugal. It is funded by the Natural Environment Research Council (NERC), the BTO, and the Portuguese Foundation for Science and Technologies ( Fundacao para a Ciencia e a Tecnologia).


Story Source:

The above story is based on materials provided by University of East Anglia. Note: Materials may be edited for content and length.


Cite This Page:

University of East Anglia. "Why have white storks stopped migrating?." ScienceDaily. ScienceDaily, 27 February 2013. <www.sciencedaily.com/releases/2013/02/130227085845.htm>.
University of East Anglia. (2013, February 27). Why have white storks stopped migrating?. ScienceDaily. Retrieved April 20, 2014 from www.sciencedaily.com/releases/2013/02/130227085845.htm
University of East Anglia. "Why have white storks stopped migrating?." ScienceDaily. www.sciencedaily.com/releases/2013/02/130227085845.htm (accessed April 20, 2014).

Share This



More Plants & Animals News

Sunday, April 20, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Mich. Boy Unearths 10,000-Year-Old Mastodon Tooth

Mich. Boy Unearths 10,000-Year-Old Mastodon Tooth

Newsy (Apr. 20, 2014) A 9-year-old Michigan boy was exploring a creek when he came across a 10,000-year-old tooth from a prehistoric mastodon. Video provided by Newsy
Powered by NewsLook.com
Vermont Goat Meat Gives Refugees Taste of Home

Vermont Goat Meat Gives Refugees Taste of Home

AP (Apr. 18, 2014) Dairy farmers and ethnic groups in Vermont are both benefiting from a unique collaborative effort that's feeding a growing need for fresh and affordable goat meat. (April 18) Video provided by AP
Powered by NewsLook.com
Man Claims He Found Loch Ness Monster With... Apple Maps?

Man Claims He Found Loch Ness Monster With... Apple Maps?

Newsy (Apr. 18, 2014) Andy Dixon showed the Daily Mail a screenshot of what he believes to be the mythical beast swimming just below the lake's surface. Video provided by Newsy
Powered by NewsLook.com
First Ever 'Female Penis' Discovered In Animal Kingdom

First Ever 'Female Penis' Discovered In Animal Kingdom

Newsy (Apr. 18, 2014) Not only are these newly discovered bugs' sex organs reversed, but they also mate for up to 70 hours. Video provided by Newsy
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins