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A review of Ireland's waterbirds, with emphasis on wintering migrants and reference to H5N1 avian influenza.

Crowe O, Wilson J, Aznar I, More S - Ir Vet J (2009)

Bottom Line: The distribution, feeding habits and social interactions of the five groups of wintering migrants are considered in detail.Throughout Ireland, there is interaction between different waterbird populations (breeding migrants, the wintering migrants and resident waterbird populations).There is also a regular and complex pattern of movement between feeding and roosting areas, and between wetlands and farmland.

View Article: PubMed Central - HTML - PubMed

Affiliation: Birdwatch Ireland, P,O, Box 12, Greystones, Co, Wicklow, Ireland.

ABSTRACT
Ireland is characterised by its diversity and large abundance of wetlands, making it attractive to a wide variety of waterbirds throughout the year. This paper presents an overview of Ireland's waterbirds, including ecological factors relevant to the potential introduction, maintenance, transmission and spread of infectious agents, including the H5N1 avian influenza virus, in Ireland. Particular emphasis is placed on five groups of wintering migrants (dabbling and sieving wildfowl, grazing wildfowl, diving wildfowl, waders and gulls), noting that the H5N1 avian influenza virus has mainly been isolated from this subset of waterbirds. Ireland's wetlands are visited during the spring and summer months by hundreds of thousands of waterbirds which come to breed, predominantly from southern latitudes, and during the autumn and winter by waterbirds which come from a variety of origins (predominantly northern latitudes), and which are widely distributed and often congregate in mixed-species flocks. The distribution, feeding habits and social interactions of the five groups of wintering migrants are considered in detail. Throughout Ireland, there is interaction between different waterbird populations (breeding migrants, the wintering migrants and resident waterbird populations). There is also a regular and complex pattern of movement between feeding and roosting areas, and between wetlands and farmland. These interactions are likely to facilitate the rapid transmission and spread of the H5N1 avian influenza virus, if it were present in Ireland.

No MeSH data available.


Related in: MedlinePlus

Pochard (Aythya ferina).
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Figure 11: Pochard (Aythya ferina).

Mentions: Whooper Swan and Wigeon are the most widely distributed species of this group, found grazing next to wetlands in almost all counties. Greenland White-fronted Geese are largely concentrated in Wexford Harbour, in particular on the Slobs, though small numbers also occur at approximately 30 locations elsewhere in the country. The range of migratory (Icelandic) Greylag Goose is also quite restricted, and just six flocks are recognised in the Republic. However, the introduced population of this species is much more widespread, and small numbers occur throughout the country, and throughout the year. Barnacle and Light-bellied Brent Geese remain along the coast throughout the winter period. The former species is distributed mostly on the islands along the west and northwest coast of Ireland, where it feeds predominantly on grasslands. Light-bellied Brent Geese occur on estuaries along the east, south and southwest coasts, and increasingly use coastal grasslands as the winter progresses. Wigeon also feed on grassland, but are restricted to those adjoining wetlands, for security (Figure 11).


A review of Ireland's waterbirds, with emphasis on wintering migrants and reference to H5N1 avian influenza.

Crowe O, Wilson J, Aznar I, More S - Ir Vet J (2009)

Pochard (Aythya ferina).
© Copyright Policy
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC3113761&req=5

Figure 11: Pochard (Aythya ferina).
Mentions: Whooper Swan and Wigeon are the most widely distributed species of this group, found grazing next to wetlands in almost all counties. Greenland White-fronted Geese are largely concentrated in Wexford Harbour, in particular on the Slobs, though small numbers also occur at approximately 30 locations elsewhere in the country. The range of migratory (Icelandic) Greylag Goose is also quite restricted, and just six flocks are recognised in the Republic. However, the introduced population of this species is much more widespread, and small numbers occur throughout the country, and throughout the year. Barnacle and Light-bellied Brent Geese remain along the coast throughout the winter period. The former species is distributed mostly on the islands along the west and northwest coast of Ireland, where it feeds predominantly on grasslands. Light-bellied Brent Geese occur on estuaries along the east, south and southwest coasts, and increasingly use coastal grasslands as the winter progresses. Wigeon also feed on grassland, but are restricted to those adjoining wetlands, for security (Figure 11).

Bottom Line: The distribution, feeding habits and social interactions of the five groups of wintering migrants are considered in detail.Throughout Ireland, there is interaction between different waterbird populations (breeding migrants, the wintering migrants and resident waterbird populations).There is also a regular and complex pattern of movement between feeding and roosting areas, and between wetlands and farmland.

View Article: PubMed Central - HTML - PubMed

Affiliation: Birdwatch Ireland, P,O, Box 12, Greystones, Co, Wicklow, Ireland.

ABSTRACT
Ireland is characterised by its diversity and large abundance of wetlands, making it attractive to a wide variety of waterbirds throughout the year. This paper presents an overview of Ireland's waterbirds, including ecological factors relevant to the potential introduction, maintenance, transmission and spread of infectious agents, including the H5N1 avian influenza virus, in Ireland. Particular emphasis is placed on five groups of wintering migrants (dabbling and sieving wildfowl, grazing wildfowl, diving wildfowl, waders and gulls), noting that the H5N1 avian influenza virus has mainly been isolated from this subset of waterbirds. Ireland's wetlands are visited during the spring and summer months by hundreds of thousands of waterbirds which come to breed, predominantly from southern latitudes, and during the autumn and winter by waterbirds which come from a variety of origins (predominantly northern latitudes), and which are widely distributed and often congregate in mixed-species flocks. The distribution, feeding habits and social interactions of the five groups of wintering migrants are considered in detail. Throughout Ireland, there is interaction between different waterbird populations (breeding migrants, the wintering migrants and resident waterbird populations). There is also a regular and complex pattern of movement between feeding and roosting areas, and between wetlands and farmland. These interactions are likely to facilitate the rapid transmission and spread of the H5N1 avian influenza virus, if it were present in Ireland.

No MeSH data available.


Related in: MedlinePlus