Showing posts with label birds. Show all posts
Showing posts with label birds. Show all posts

Wednesday, November 9, 2011

Irish scientists unravel the mystery of the 'pink swans'

In a paper to be published in the international journal Wildfowl UCC researchers, describe for the first time, the cause of pink coloration in Mute swans which has been observed in many parts of Ireland, Britain and North America. 

‘Symmetrical salmon-pink colour was first evident on the wing feather tips and then spread to the entire wing as the year progressed, darkened as winter approached, and sometimes developed to a brown colour’ according to Professor John O’Halloran the study director and Head of the School of Biological, Earth and Environmental Science (BEES) at the University.

Unfortunately, ‘the affected feathers tended to become brittle, fragmented and lose their ability to repel water and the plumage could no longer function and some birds died from hypothermia’. Surveys made at nine sites in Britain and Ireland found between 12–85% of swans with pink coloration.  The highest prevalence occurred amongst flocks dependent on artificial food in eutrophic water bodies.

Feather samples (white and pink), bill swabs and swabs of preen gland oil collected from swans, and also pink fungus isolated from bread samples, were cultured and subjected to analysis, to identify organisms and pigments. Salmon-pink Chrysonilia sitophila fungus colonies developed on agars inoculated with samples from pink swans and from the bread sample, but were absent from control swans.

The pigments in pink feathers were generally consistent with those found in C. sitophila, indicating that C. sitophila is the most likely agent responsible for the pink colour on swan plumage.

‘The evidence from this study suggests that C. sitophila is acquired through exposure to contaminated food via the bill and is preened onto the plumage’ says O'Halloran.

A layer of environmental contaminants and debris that coats the plumage of swans inhabiting eutrophic water bodies may provide a substrate for fungal growth and added to the problems for the swans.

‘The clear message from this study is to feed swans natural foods not stale bread- contaminated with fungi’ according to O’Halloran.

Friday, August 5, 2011

Science Snapshot 12: Wall of Birds






For the next few weeks, along with some of our usual posts, we're posting a series of  'Science Snapshots'.
Science Snapshot was really popular when we ran it last year for Science Week and this will be a continuation along the same theme.

You can see all of the snapshots so far by clicking here.

Today's image is from the Irish Natural History Museum, now re-opened after it's enforced closure. The museum is one of the best such museum in Europe and is often described as a 'museum of a museum'.










Wednesday, May 4, 2011

Nestcam 2011

Derek Mooney and his team are continuing their Nestcam experiments, with Blue Tits nesting in Derek's back garden and the garden at Áras an Uachtaráin (the residence of the Irish President).


You can watch the live webcam, read the diary and find out more information here.

For information on Nestcam 2012, see the website.

Saturday, December 25, 2010

Christmas Science 20: Happy Christmas

In the run up to Christmas, we've been posting 20 Christmas Science Facts. In this, our last posting in the series, I'd like to take the oppurtunity to wish all of our readers a very happy and restful Christmas. A special thank you to those who have contributed and helped out on the blog throughout the year... You know who you are!


During the recent cold spell, I came across a very inquisitive little robin along the banks of the river Lee in Cork City. Since one of our Christmas Science posts has already dealt with the robin, I'm just posting a few of my own pictures of the bird in question in the snow.


Happy Christmas!




Monday, December 20, 2010

Dodo gets a 21st Century Facelift

Dr. Julian Pender Hume of the the London Natural History Museum, an artist and a palaeontologist, updates our view of the Dodo based on scientific evidence in this excellent video clip. The resultant painting will form part of the "Images of Nature" exhibition at the museum next year.


Thursday, December 9, 2010

Christmas Science 4: Robin

In the run up to Christmas, Communicate Science offers you 20 Christmas Science Facts. We'll post one every day until the 25th December.

Robin
A small chirpy robin, perched on the edge of a snow covered field is a Christmas card image that we are all familiar with. The robin (Erithacus rubecula) is, according to the RSPB, the UK's favourite bird. It's probably the same story in Ireland where it is a very familiar sight in both urban and rural environments.

While males and females both look the same, with their distinctive red breast, young birds lack the red colouration and are spotted and golden brown.

One estimate puts the number of individual robins in Ireland at between 3 and 4 million! Research in UCC a few years back showed that the average number of eggs laid by robins in Ireland (4.6) is lower than that in Britain. However, more chicks seem to survive here than in the UK.

Robins are intensely territorial birds, which can lead to fights breaking out between birds defending their territory from 'invading' robins. The red breast helps robins to ward off intruders.

Sunday, September 26, 2010

Science Gallery: Wexford Wildfowl Reserve Picture Special

This weekend, Communicate Science visited Co. Wexford and the Wexford Wildfowl Reserve. The reserve is based in the Wexford Slobs - lands reclaimed from the sea in the 1840's, with the building of the sea wall and the pumphouse (pictured). A history of the land reclamation projects in Wexford harbour is available here.

The North Slobs was land reclaimed from mudflats for agricultural purposes. A long dyke was constructed to keep out the sea and the land was kept dry by the pumps housed in the pump house. The traditional use of the land for winter crops and summer grazing is still maintained.


The North Slob lies three metres below sea level so a pumping system is required to remove surplus rainwater into the harbour. In 1850, the pumphouse housed a Watt Steam Pump. This remained in use until the 1940's. In 1912, the building was extended and a Reece Wolverhampton Vane Pump was installed. This pump is still maintained as aback-up pump to this day. It has the potential to pump up to 100 tons of water a minute and is powered by a six-cylinder diesel engine.


In the 1950's this diesel engine was replaced by an electric motor, while the present Primary Electric Pump was installed in the late 1960's and can pump water from the North Slob at a rate of 64 tons per minute.



This reclamation and drainage provides a unique environment for wildlife to flourish and the reserve is supported by an excellent visitor centre (with FREE entry) maintained for the Department of Environment, Heritage and Local Government by National Parks and Wildlife.




One interesting piece of information (which I picked up in the outstanding visitor centre) was that in 1951, the managing director of Guinness, Sir Hugh Beaver was shooting on the North Slob when he got into a discussion with some companions about whether the Golden Plover was the fastest game bird in Europe. This conversation inspired him to publish the first edition of the Guinness Book of Records which was published in 1955.

There is also an interesting display depicting some important stages in the evolution of dinosaurs to birds.




The North Slob and the adjacent Raven Nature Reserve are also Ireland's only hare sanctuary with up to 200 hares present at any one time.


The Raven Nature Reserve makes up the major part of the sand dune system, at the north side of the entrance to Wexford Harbour and forms the boundary of the North Slobs to the east. The dune system was heavily planted with conifers during the 1930's which means that what was once, botanically, the finest dune system in Ireland is now mostly conifer plantations with small areas of dune remaining. It's still well worth a visit and is a popular spot for walking.

J. Michael Wilson's poem The Raven captures something of the history and the biodiversity of the area:

On Nature's dunes man-planted pines-
Create a bastion to the tides.
High skies greet primroses, orchids, butterflies;
The darkness wakens badgers, owls;
While woddcock rode across the dusk
To the cries of plover, geese and seals-
Music for the toads' shrill evening song.





Friday, September 10, 2010

Birds of America

Birds of America by John James Audubon is reckoned to be the world's most expensive book and is due to fetch around £6 million when it is auctioned at Sotheby's in London on December 7th.

The reference book contains 435 hand-coloured, life-size prints of 497 bird species and measures 39 by 26 inches. Only 119 copies are known to remain.

Audubon was a French-American ornithologist, naturalist, hunter and painter. He travelled to the UK in 1826 where he became a minor celebrity and raised enough money to begin publishing the drawings he brought with him.

 



Tuesday, May 4, 2010

Poisoning hampers re-introduction efforts

In what has been described as the worst spate of poisoning in recent years, 10 protected birds of prey including three Red Kites, two White-tailed Eagles, a Golden Eagle, three Buzzards and a Peregrine Falcon have been confirmed poisoned in the Republic of Ireland.

Two Red Kites and a Peregrine were found dead in Co. Wicklow, a third Red Kite released in Northern Ireland was found dead in Co. Kildare, a Golden Eagle in Co. Leitrim, and Buzzards in west Waterford, east Cork and Donegal (one of which recovered from poisoning) . All of these were poisoned by ingesting meat baits laced with Alphachloralose.

Within the last few weeks two White-tailed Eagles were found dead near Beaufort, Co. Kerry. Toxicology analyses at the State Laboratory in Celbridge, Co. Kildare, and the SASA lab, Edinburgh, Scotland, confirmed that both eagles had been poisoned by Carbofuran, a substance previously used as a pesticide but now illegal in Ireland. Searches of land in the Beaufort area located a dead lamb, a raven also poisoned by Carbofuran, as well as other livestock in various stages of decomposition.

A male White-tailed Eagle released in Killarney National Park in 2008 was found in the River Laune near Beaufort by Stewart Stephens, Laune Angling Club, on 4 April and recovered the following day. A second male White-tailed Eagle, released in 2007 was found on land in Beaufort on 12 April. Both eagles were in excellent condition and had been surviving well in the wild for 2-3 years until poisoned. One eagle had been feeding on the carcass of a sheep when it died as wool was found in the crop along with meat. An investigation is ongoing by the Department of Agriculture and Gardaí in Killarney.

"The older male could have been one of the first birds to breed in the wild in Ireland in over 100 years""The loss of a further two White-tailed Eagles at this time is devastating", said Dr. Allan Mee, Manager of the White-tailed Eagle Reintroduction Project in Kerry. "The older male could have been one of the first birds to breed in the wild in Ireland in over 100 years had it survived. That it was in such good condition at the time of its death makes its loss even more tragic. We know that eagles can thrive in Kerry if given the chance but indiscriminate poisoning is literally killing our chances of re-establishing a population here" he added.

The deaths of these two birds brings to 13 the total number of White-tailed Eagles found dead, seven of which have now been confirmed poisoned, all in Co. Kerry. Fifty-five birds have been released in Kerry since 2007. "The loss of the older male is particularly hard to take because we have now lost 7 of the 15 eagles released in 2007. Year by year we are losing most of the oldest birds that could be breeding in a few years. Many of the birds have been finding sources of fish in the rivers and lakes for the first time this year which is a really positive sign. Unfortunately even birds that are intent on fishing along our rivers don't escape the threat of poisoning. If there is a carcass laced with poison in fields nearby eventually one of the eagles will be drawn to it. We can't fully protect these birds unless we stop indiscriminate poisoning" Mee added.

Despite this threat many eagles have travelled the length and breadth of the country, including at least three birds that travelled to Scotland and back, without being harmed. "One male White-tailed Eagle travelled to the Orkney Islands off the north coast of Scotland and back over an eight month period. Another satellite tracked eagles called Fiadhna (after 9 year old Fiadhna Tangney in the Black Valley) left Killarney after release in August 2009 and has now visited 28 of the 32 counties in Ireland" Mee commented.

"The future for the reintroduction is cooperation and mutual respect"After spending the winter in the Antrim hills, Fiadhna moved west into Donegal then back east to the Sperrin Mountains, travelled on to the Cooley peninsula in Louth, before crossing west to the midlands. She then headed south to Kerry but then crossed into Clare and on to Connemara before heading east to Wicklow. In the last few weeks she returned to Northern Ireland and is now back in the Antrim Hills. "It is heartening to know that Fiadhna can cross the country and roost and feed on literally hundreds of farms in many counties without coming to any harm. To my mind this shows that the vast majority of farmers respect nature and do not use poisons. Just the other day we had a phone call from a farmer in Antrim who was happy to report that Fiadhna was back on the same farm she left months ago. The future for the reintroduction is cooperation and mutual respect between ourselves and the farming communities that eagles inhabit" Mee added.

Cooperation and support from the donor country, Norway, has been critical to the success of the White-tailed Eagle reintroduction in Kerry. However, the continuing loss of eagles to poisoning has cast a shadow over the future of this ambitious programme. The Directorate for Nature Management in Norway has supported the reintroduction programme to reestablish the White-tailed Eagle as a breeding bird in Ireland. Permits to collect up to 20 fledglings per year from Norway during 2007-2009 have been issued given that the population in Norway is a healthy and growing population, and based on the reports on Ireland still being a well suited area for the species. The Directorate of Nature Management is concerned to learn about the casualties caused by illegal poisoning. In Norway there is no evidence that White-tailed eagle predates on livestock.

The Directorate believes that the Irish authorities will take the necessary steps to correct this situation, and give the White-tailed eagle a future in Ireland.

Of three poisoned Red Kites found in the last month, a female found in Kildare had been released in Co. Down in 2008 as part of a reintroduction programme in Northern Ireland managed by the Royal Society for the Protection of Birds. The RoI Reintroduction in Co. Wicklow is managed by the Golden Eagle Trust in partnership with the Department of the Environment, Heritage, and Local Government. Although some Red Kites from Wicklow and Co. Down have crossed the border in past years, this is the first kite from Northern Ireland to be found poisoned in the Republic.

Robert Straughan, Red Kite Project Officer commented "The RSPB are seeking a coordinated approach between all relevant statutory and non-statutory organisations to tackling crimes against birds of prey in Northern Ireland. The death of one of our red kites in the Republic also highlights the need for us to co-ordinate our efforts cross-border.

In NI, the new Wildlife and Natural Environment Bill will introduce tougher fines and custodial sentences for those committing crimes against wildlife, and we are also seeking an amendment to the Bill to make it an offence to possess certain pesticides. This would close a legal loophole which allows an individual to possess highly toxic chemicals for which they could have no legitimate use other than to commit an offence of poisoning animals or birds.

Political support has been demonstrated by MLAs, including Environment Minister Edwin Poots, who signed our pledge to stop illegal killing of birds of prey, which gathered over 200,000 signatures as part of RSPB's Birds of Prey campaign. The Ulster Farmers' Union have also demonstrated their support for our Red Kite project by including a red kite in their newly re-designed logo".

"All the evidence points to Alphachloralose being the poison of choice"Two Red Kites were found also dead in Co. Wicklow in mid-March. One was found floating in the sea off Wicklow Head by members of the RNLI. A second bird was found by a member of the public on a road in west Wicklow. Initially both birds were thought to have died from natural causes but tests revealed toxic levels of Alphachloralose, a narcotic used to target crows and foxes. "All the evidence we have points to Alphachloralose being the number one poison of choice in use today and the most prevalent toxin threatening the viability of the Red Kite reintroduction in Wicklow", said Damian Clarke, Project Manager for the Golden Eagle Trust. "Despite the fact that it has been banned for some years in the UK we still continue to allow its production and use in Ireland. This is unsustainable and we have a duty to afford Kites from Northern Ireland the same protection as in the UK", Clarke added.

Although the use of poison on meat baits for the control of crows was banned in 2008, the use of meat baits to kill foxes is still permitted under current regulations (Protection of Animals Act 1965). This loophole has allowed the continued use of poison and continue to pose a huge threat to our native birds of prey. However, an amendment to the Wildlife Act which will outlaw all use of poison on meat baits is imminent. In addition, the Department of Agriculture, Fisheries and Food fails to ensure that farmers, who are in receipt of direct payments (Single Farm Payment and Rural Environmental Protection Scheme) under the EU Common Agricultural Policy, comply with the Cross Compliance Policy and that they duly implement the Statutory Management Requirements in respect of the obligation not to harm Annex 1 birds of prey (which are protected under the Birds Directive). The Golden Eagle Trust is calling on the Department of Agriculture to initiate immediate farm inspections where poisoning is found to occur.

The ongoing use of toxins in the Irish Agri-Food industry will in time begin to tarnish the very valuable image of natural clean Irish food products especially in foreign markets. The Irish farming sector quite rightly highlights the very highest environmental standards our farmers follow. But the growing evidence of illegal use of poison by a tiny minority of sheep farmers is a gross contradiction of this valuable marketing tool used by an Bord Bia and others. Using poisons tarnishes the clean, green image that the Irish agri-food sector has built its reputation on.

The fact that the vast majority of farmers successfully produce food without recourse to poisons begs the question why a small minority can undermine the good image of Irish food production and rural development by using poison. Likewise, poisoning does nothing to enhance the image of the Irish countryside which is important to the tourism industry. On the contrary, ecotourism including wildlife tourism and eagle watching safaris bring in over 2 million pounds annually to the economy of Mull in western Scotland and have the potential to be an important additional selling point in Kerry where eagle tourism is just taking off. Visitor numbers at Glenveagh National Park have increased over the past few years and the resident Golden Eagles have proved to be an important attraction to the public

This report originally appeared on the website of the Golden Eagle Thrust.

Monday, April 26, 2010

More Tweeting - Mooney Goes Birdwatching



 This is the post for Nestwatch 2010. For more information on the 2011 nestcams, see our new post.

For information on Nestcam 2012, see the website.
Hot on the heels of our own tweeting debut, congratulations are in order for Derek Mooney and his Mooney Goes Wild team (RTE Radio 1) for continuing their Nestcam experiments.

You can see a robin looking after five hatchlings in Derek's back garden here. Meanwhile, over in Áras an Uachtaráin (the residence of the Irish President), a bluetit is building it's nest and preparing to lay eggs.

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