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Table 1 Waterbird species occurring in Ireland

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

Species   Occurrence in Ireland
Divers and grebes
Red-throated Diver Gavia stellata Wintering - September to April, small numbers (<10 pr) breed in Donegal
Black-throated Diver Gavia arctica Wintering - September to April (Scarce)
Great Northern Diver Gavia immer Wintering - September to April
Little Grebe Tachybaptus ruficollis Year-round
Great Crested Grebe Podiceps cristatus Year-round, numbers increase during the winter due to immigrating birds
Shearwaters and Petrels
Manx Shearwater Puffinus puffinus Breeding - March to August
European Storm-petrel Hydrobates pelagicus Breeding - March to August
Leach's Storm-petrel Oceanodroma leucorhoa Breeding - March to August and passage September to October
Fulmar Fulmarus glacialis Year-round
Gannet
Gannet Morus bassana Year-round
Cormorants
European Shag Phalacrocorax aristotelis Year-round, few seen inshore outside the breeding season
Cormorant Phalacrocorax carbo Year-round, some immigration during the winter
Herons
Grey Heron Ardea cinerea Year-round
Little Egret Egretta garzetta Year-round
Wildfowl (swans, geese and ducks)
Mute Swan Cygnus olor Year-round
Bewick's Swan Cygnus columbianus Wintering - October to April
Whooper Swan Cygnus cygnus Wintering - October to April
Greenland White-fronted Goose Anser anser flavirostris Wintering - October to April
Greylag Goose Anser anser Year-round (feral birds), augmented by wintering birds- October to April
Canada Goose Branta canadensis Year-round (feral birds)
Barnacle Goose Branta leucopsis Wintering - October to April
Light-bellied Brent Goose Branta branta hrota Wintering - October to April
Shelduck Tadorna tadorna Wintering - September to April
Wigeon Anas penelope Wintering - September to April
Gadwall Anas strepera Year-round, augmented by wintering birds - October to April (scarce)
Teal Anas crecca Year-round, augmented by wintering birds - September to April
Mallard Anas platyrhynchos Year-round, augmented by wintering birds - September to April
Pintail Anas acuta Wintering - September to April
Shoveler Anas clypeata Wintering - September to April
Pochard Aythya ferina Predominantly wintering - September to April, small numbers breed
Tufted Duck Aythya fuligula Predominantly wintering - September to April, small numbers breed
Scaup Anas marila Wintering - September to April
Eider Somateria mollissima Wintering - September to April
Long-tailed Duck Clangula hyemalis Wintering - September to April
Common Scoter Melanitta nigra Predominantly wintering - September to April, small numbers breed
Goldeneye Bucephala clangula Wintering - September to April
Red-breasted Merganser Mergus serrator Wintering - September to April, small numbers breed in West
Goosander Mergus merganser Year-round, small numbers breed (scarce)
Ruddy Duck Oxyura jamaicensis Year-round (feral birds)
Rail & Coots
Water Rail Rallus aquaticus Year-round
Moorhen Gallinula chloropus Year-round, augmented by wintering birds - September to April
Coot Fulica atra Year-round, augmented by wintering birds - September to April
Waders
Oystercatcher Haematopus ostralegus Year-round, augmented by wintering birds - September to April
Ringed Plover Charadrius hiaticula Year-round, augmented by wintering birds - September to April
Golden Plover Pluvialis apricaria Wintering birds - September to April, breeding birds - April to September, some overlap in populations
Grey Plover Pluvialis squatarola Wintering birds - September to April
Lapwing Vanellus vanellus Wintering birds - September to April, breeding birds - April to September, some overlap in populations
Knot Calidris canutus Wintering birds - September to April
Sanderling Calidris alba Wintering birds - September to April
Little Stint Calidris minuta Passage birds - August to October (scarce)
Curlew Sandpiper Calidris ferruginea Passage birds - August to October (scarce)
Purple Sandpiper Calidris maritima Wintering birds - September to April
Dunlin Calidris alpina Wintering birds - September to April, small numbers breed in west
Ruff Philomachus pugnax Spring and autumn passage (scarce)
Jack Snipe Lymnocryptes minimus Wintering birds - September to April
Snipe Gallinago gallinago Year round, augmented by wintering birds - September to April
Woodcock Scolopax rusticola Year round, augmented by wintering birds - September to April
Black-tailed Godwit Limosa limosa Wintering birds - August to April
Bar-tailed Godwit Limosa lapponica Wintering birds - September to April
Whimbrel Numenius phaeopus Passage birds - April to September
Curlew Numenius arquata Year round, augmented by wintering birds - September to April
Redshank Tringa totanus Year round, augmented by wintering birds - September to April
Greenshank Tringa nebularia Wintering birds - September to April
Common Sandpiper Actitus hypoleucos Summer visitor - breeding birds present April to September
Turnstone Arenaria interpres Wintering birds - September to April
Skuas, Gulls & Terns
Great Skua Stercorarius skua Passage birds - April to October
Arctic Skua S. parasiticus Passage birds - April to October
Mediterranean Gull Larus melanocephalus Year-round, very small breeding numbers (scarce)
Black-headed Gull Larus ridibundus Year-round, some local migration to/from breeding areas
Common Gull Larus canus Year-round, some local migration to/from breeding areas in west.
Lesser Black-backed Gull Larus fuscus Occur during the breeding season, March/April to August/September
Herring Gull Larus argentatus Year-round, some local migration
Great Black-backed Gull Larus marinus Year-round, some local migration
Little Gull Larus minutus Wintering birds - September to April (scarce)