The white-tailed sea-eagles nest in Ireland for the first time in over 100 years. The Irish white-tailed sea eagle was driven to extinction in the early 20th century. But thanks to the White-Tailed Sea Eagle Reintroduction Project the eagles face a new spring in Ireland with the first documented nesting attempt in more than a century. Now, Norwegian Sea Eagles Make Success in Ireland.
The breeding birds that bring new hope to the sea eagle stock are a four year old male and a three year old female originating from the island of Frøya, off the west coast of Norway.
They were released in Killarney National Park in 2008 and 2009, respectively. In 2012, they each found their way to Co. Clare and paired up, and this spring they nested on a small island on Lough Derg, one of Ireland’s biggest lakes, close to the village of Mountshannon.
“This is a truly momentous event,” sayid Dr. Allan Mee, project manager for the Golden Eagle Trust. “Seeing them nesting in the wild in Ireland is the day we have all been waiting for”.
The future looks bright
First-time breeders lack experience, and breeding success depends on getting everything right. But Mee is impressed by the young couple.
He said that once the birds settled down to incubate the clutch of eggs both parents were very diligent. The nest has only very rarely been left unattended and birds have been quick to spot potential dangers such as the presence of hooded crows which might predate the eggs.
Related: A Natural Born Birder in Norway
Six weeks to hatch
“Since the eggs take some six weeks to hatch, they still have a long way to go. But so far so good,” said Mee.
And according to Dr. Duncan Halley, the eagles have chosen a good spot for their first attempt.
White-tailed sea eagles usually begin to breed at five years of age. But in this case the lake is shallow and productive, ensuring a good food supply. In addition, there is no competition from other breeders.
“This combination may explain breeding at this young age,” Halley stated.
Together with Dr. Torgeir Nygård he is responsible for the NINA part of the program.
Following the sea-eagles
The sea-eagle population was also threatened at one time in Norway, but increased as a direct result of legal protection in 1968.
Today Norway has the largest breeding population in Western-Europe.
In total one hundred Norwegian white-tailed eagles were released between 2007 and 2011 in Killarney National Park, Co. Kerry.
These birds have dispersed throughout Ireland and beyond. To date 21 birds are known to have died.
All birds were collected in the Trøndelag area in Norway, one bird only from nests with more than one chick. A time-consuming task, as only 20 percent of the nests have two chicks, or, very rarely, three.
Many local volunteers
“The contribution from the many local volunteer bird enthusiasts has been crucial for the project’s success,” said Halley.
In May he and Nygård are flying to Ireland together with some of the volunteers, and with a lot of luck, to observe the hatching.
The birds are very sensitive to disturbance, and the brooding period is a critical time. The Golden Eagle Trust have constructed a viewing area onshore with a telescope for close viewing. Information on the birds, their ecology and conservation is also available.
Whatever the outcome of this nesting attempt, the signs are good for future breeding in the area.
Sea-eagles can live up to 30 years and generally mate for life with adult pairs remaining within their home range throughout the year.
Related: National Parks in Scandinavia
Update July 2020:
Project started in 2007
In the years from 2007 to 2011, 100 sea eagles were retrieved from nests on the Trøndelag coast. The birds were captured from Leka in the north to Hitra and Frøya in the south, and released in the Irish Killarney National Park.
A recent report summarizes what has happened after exports from Norway:
In 2010, the first couple was formed in Ireland.
In 2012, the first couple built a nest and had a baby bird, that died shortly after.
In 2014, the number of couples had increased to 14.
In 2015, a nest gave birth to two baby birds.
Until 2017, juvenile production increased. Since then, things have gone a little worse. The two most successful pairs died of bird flu in 2018, and the storm Hannah destroyed the nest in 2019 when almost no cubs were born.
This article, Norwegian Sea Eagles Nest in Ireland (except Update July 2020), written by Camilla Næss, was produced and financed by NINA – Norwegian Institute for Nature Research, and was published on Sciencenorway on 3rd May 2012.
Feature image (on top): Argos Team