The Systematic List that follows includes all those species currently accepted as occurring as wild by the UK400 Club/British Birding Association, with those species ONLY recorded in Ireland added in dark green text (eight in total).
- Red-throated Diver
- Black-throated Diver
- Great Northern Diver
- WHITE-BILLED DIVER
- Slavonian Grebe
- Black-necked Grebe
- Little Grebe
- Great Crested Grebe
- Red-necked Grebe
- Northern Fulmar
- Cory's Shearwater
- Great Shearwater
- FEA'S SOFT-PLUMAGED PETREL
- NORTH ATLANTIC LITTLE SHEARWATER
- Manx Shearwater
- Balearic Shearwater
- YELKOUAN SHEARWATER
- Sooty Shearwater
- European Storm Petrel
- WILSON'S PETREL
- Leach's Petrel
- Northern Gannet
- BLACK-BROWED ALBATROSS
- Cormorant
- European Shag
- Common Bittern
- LITTLE BITTERN
- BLACK-CROWNED NIGHT HERON
- CATTLE EGRET
- Little Egret
- GREAT WHITE EGRET
- Grey Heron
- PURPLE HERON
- WHITE STORK
- BLACK STORK
- GLOSSY IBIS
- Eurasian Spoonbill
- Mute Swan
- Whooper Swan
- Bewick's Swan
- Snow Goose
- ROSS'S SNOW GOOSE
- Eurasian White-fronted Goose
- Greenland White-fronted Goose
- Taiga Bean Goose
- Tundra Bean Goose
- Pink-footed Goose
- Greylag Goose
- Great Canada Goose
- Small Canada Goose
- Barnacle Goose
- Dark-bellied Brent Goose
- Pale-bellied Brent Goose
- BLACK BRANT
- RED-BREASTED GOOSE
- Common Shelduck
- Ruddy Shelduck
- Egyptian Goose
- Mandarin Duck
- Mallard
- Gadwall
- Pintail
- NORTH AMERICAN BLACK DUCK
- Northern Shoveler
- Eurasian Wigeon
- AMERICAN WIGEON
- FALCATED DUCK
- Common Teal
- American Green-winged Teal
- Garganey
- BLUE-WINGED TEAL
- Northern Pochard
- Red-crested Pochard
- Ferruginous Duck
- Greater Scaup
- LESSER SCAUP
- Tufted Duck
- Ring-necked Duck
- Common Eider
- KING EIDER
- Common Scoter
- Velvet Scoter
- Surf Scoter
- Long-tailed Duck
- Common Goldeneye
- BARROW'S GOLDENEYE
- Smew
- Goosander
- Red-breasted Merganser
- Ruddy Duck
- White-tailed Sea Eagle
- Osprey
- Golden Eagle
- Red Kite
- BLACK KITE
- Marsh harrier
- Hen Harrier
- Montagu's Harrier
- Rough-legged Buzzard
- Common Buzzard
- European Honey Buzzard
- Eurasian Sparrowhawk
- Northern Goshawk
- Common Kestrel
- RED-FOOTED FALCON
- Eurasian Hobby
- ELEONORA'S FALCON
- Peregrine Falcon
- Merlin
- GYRFALCON
- Red Grouse
- Capercaillie
- Black Grouse
- Red-legged Partridge
- Grey Partridge
- Common Quail
- Corncrake
- Common Pheasant
- Golden Pheasant
- Lady Amherst's Pheasant
- Water Rail
- Spotted Crake
- LITTLE CRAKE
- Moorhen
- Eurasian Coot
- COMMON CRANE
- Oystercatcher
- Pied Avocet
- BLACK-WINGED STILT
- Stone Curlew
- COLLARED PRATINCOLE
- Little Ringed Plover
- Ringed Plover
- KILLDEER
- Kentish Plover
- Grey Plover
- Dotterel
- CASPIAN PLOVER
- European Golden Plover
- PACIFIC GOLDEN PLOVER
- AMERICAN GOLDEN PLOVER
- GREATER SAND PLOVER
- Lapwing
- Red Knot
- Sanderling
- Purple Sandpiper
- Turnstone
- Dunlin
- Curlew Sandpiper
- BROAD-BILLED SANDPIPER
- Temminck's Stint
- Little Stint
- Wood Sandpiper
- Green Sandpiper
- Common Sandpiper
- SPOTTED SANDPIPER
- TEREK SANDPIPER
- Common Redshank
- Spotted Redshank
- Common Greenshank
- MARSH SANDPIPER
- Black-tailed Godwit
- Bar-tailed Godwit
- Eurasian Curlew
- Whimbrel
- Woodcock
- GREAT SNIPE
- Common Snipe
- WILSON'S SNIPE
- Jack Snipe
- Grey Phalarope
- Red-necked Phalarope
- WILSON'S PHALAROPE
- BAIRD'S SANDPIPER
- WHITE-RUMPED SANDPIPER
- SEMIPALMATED SANDPIPER
- WESTERN SANDPIPER
- Ruff
- BUFF-BREASTED SANDPIPER
- PECTORAL SANDPIPER
- LESSER YELLOWLEGS
- SOLITARY SANDPIPER
- UPLAND SANDPIPER
- STILT SANDPIPER
- LONG-BILLED DOWITCHER
- HUDSONIAN WHIMBREL
- Great Skua
- Pomarine Skua
- Arctic Skua
- Long-tailed Skua
- Black-headed Gull
- BONAPARTE'S GULL
- Common Gull
- Ring-billed Gull
- Mediterranean Gull
- Herring Gull
- Yellow-legged Gull
- Caspian Gull
- NORTH AMERICAN HERRING GULL
- AUDOUIN'S GULL
- Lesser Black-backed Gull
- Great Black-backed Gull
- ROSS'S GULL
- Little Gull
- Kittiwake
- Sabine's Gull
- Glaucous Gull
- Iceland Gull
- LAUGHING GULL
- FRANKLIN'S GULL
- Little Tern
- Sandwich Tern
- Common Tern
- Arctic Tern
- Roseate Tern
- CASPIAN TERN
- GULL-BILLED TERN
- FORSTER'S TERN
- Black Tern
- White-winged Black Tern
- WHISKERED TERN
- Little Auk
- Atlantic Puffin
- Black Guillemot
- Common Guillemot
- Razorbill
- Rock Dove
- Stock Dove
- Woodpigeon
- Collared Dove
- European Turtle Dove
- Common Cuckoo
- Tawny Owl
- EURASIAN EAGLE OWL
- SNOWY OWL
- Long-eared Owl
- Short-eared Owl
- Barn Owl
- Little Owl
- European Nightjar
- Common Swift
- PALLID SWIFT
- ALPINE SWIFT
- LITTLE SWIFT
- PACIFIC SWIFT
- Eurasian Hoopoe
- Common Kingfisher
- EUROPEAN BEE-EATER
- EUROPEAN ROLLER
- Ring-necked Parakeet
- European Green Woodpecker
- Great Spotted Woodpecker
- Lesser Spotted Woodpecker
- Wryneck
- Skylark
- Woodlark
- GREATER SHORT-TOED LARK
- CALANDRA LARK
- BLACK LARK
- Shore Lark
- Sand Martin
- EURASIAN CRAG MARTIN
- Barn Swallow
- RED-RUMPED SWALLOW
- House Martin
- TAWNY PIPIT
- RICHARD'S PIPIT
- Water Pipit
- Rock Pipit
- AMERICAN BUFF-BELLIED PIPIT
- Meadow Pipit
- Tree Pipit
- RED-THROATED PIPIT
- White Wagtail
- Pied Wagtail
- Yellow Wagtail
- BLACK-HEADED WAGTAIL
- CITRINE WAGTAIL
- Grey Wagtail
- Winter Wren
- Dipper
- Bohemian Waxwing
- Dunnock
- European Robin
- Common Nightingale
- THRUSH NIGHTINGALE
- Bluethroat
- Common Redstart
- Black Redstart
- Northern Wheatear
- DESERT WHEATEAR
- Whinchat
- Common Stonechat
- Song Thrush
- Redwing
- Mistle Thrush
- Fieldfare
- Common Blackbird
- Ring Ouzel
- Barred Warbler
- Garden Warbler
- Blackcap
- Lesser Whitethroat
- SARDINIAN WARBLER
- Common Whitethroat
- SPECTACLED WARBLER
- WESTERN SUBALPINE WARBLER
- EASTERN SUBALPINE WARBLER
- Dartford Warbler
- Sedge Warbler
- AQUATIC WARBLER
- Grasshopper Warbler
- PALLAS'S GRASSHOPPER WARBLER
- LANCEOLATED WARBLER
- RIVER WARBLER
- SAVI'S WARBLER
- Cetti's Warbler
- European Reed Warbler
- Marsh Warbler
- PADDYFIELD WARBLER
- GREAT REED WARBLER
- FAN-TAILED WARBLER
- Icterine Warbler
- Melodious Warbler
- EASTERN OLIVACEOUS WARBLER
- BOOTED WARBLER
- Willow Warbler
- Wood Warbler
- Common Chiffchaff
- Siberian Chiffchaff
- WESTERN BONELLI'S WARBLER
- DUSKY WARBLER
- ARCTIC WARBLER
- GREENISH WARBLER
- Yellow-browed Warbler
- HUME'S LEAF WARBLER
- PALLAS'S LEAF WARBLER
- Goldcrest
- Firecrest
- Spotted Flycatcher
- BROWN FLYCATCHER
- Red-breasted Flycatcher
- Pied Flycatcher
- WHITE-COLLARED FLYCATCHER
- Great Tit
- Coal Tit
- Blue Tit
- Crested Tit
- Willow Tit
- Marsh Tit
- Long-tailed Tit
- Bearded Tit
- Nuthatch
- Common Treecreeper
- Red-backed Shrike
- WOODCHAT SHRIKE
- Northern Grey Shrike
- LESSER GREY SHRIKE
- Magpie
- Jay
- Jackdaw
- Red-billed Chough
- Rook
- Carrion Crow
- Hooded Crow
- Common Raven
- Common Starling
- ROSE-COLOURED STARLING
- Golden Oriole
- House Sparrow
- Tree Sparrow
- Chaffinch
- Brambling
- Linnet
- Twite
- Lesser Redpoll
- Mealy Redpoll
- GREENLAND REDPOLL
- SCANDINAVIAN ARCTIC REDPOLL
- HORNEMANN'S ARCTIC REDPOLL
- Goldfinch
- Greenfinch
- Siskin
- CITRIL FINCH
- European Serin
- Bullfinch
- Hawfinch
- Common Crossbill
- Scottish Parrot Crossbill
- TWO-BARRED CROSSBILL
- Common Rosefinch
- TRUMPETER FINCH
- RED-EYED VIREO
- YELLOW WARBLER
- AMERICAN REDSTART
- NORTHERN WATERTHRUSH
- DARK-EYED JUNCO
- WHITE-THROATED SPARROW
- WHITE-CROWNED SPARROW
- Reed Bunting
- LITTLE BUNTING
- RUSTIC BUNTING
- YELLOW-BREASTED BUNTING
- Snow Bunting
- Lapland Bunting
- ORTOLAN BUNTING
- CRETZSCHMAR'S BUNTING
- Yellowhammer
- Cirl Bunting
- BLACK-HEADED BUNTING
- Corn Bunting
PENDING
Hooded Merganser
ALSO CATEGORY I/E
Australian Black Swan
Bar-headed Goose
Monk Parakeet
