Research and analysis
Avian influenza in wild birds: 2023
Updated 16 December 2024
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| Week | District | County | Species (Positive) | Species (Latin) | Pathotype | Total |
|---|---|---|---|---|---|---|
| Week 1 (2023) | Aberdeenshire | Aberdeenshire | Mute Swan (1), Pink Footed Goose (2) | Cygnus olor, Anser brachyrhynchus | H5N1 HPAI | 3 |
| Week 1 (2023) | Angus | Angus | Pink Footed Goose (3) | Anser brachyrhynchus | H5N1 HPAI | 3 |
| Week 1 (2023) | Arun | West Sussex | Peregrine (2) | Falco peregrinus | H5N1 HPAI | 2 |
| Week 1 (2023) | Basingstoke and Deane | Hampshire | Mute Swan (2) | Cygnus olor | H5N1 HPAI | 2 |
| Week 1 (2023) | Basingstoke and Deane | Hampshire | Common Buzzard (1) | Buteo buteo | H5N1 HPAI | 1 |
| Week 1 (2023) | Canterbury | Kent | Canada Goose (3) | Branta canadensis | H5N1 HPAI | 3 |
| Week 1 (2023) | Carlisle | Cumbria | Greylag Goose (2) | Anser anser | H5N1 HPAI | 2 |
| Week 1 (2023) | Carlisle | Cumbria | Greylag Goose (1) | Anser anser | H5N1 HPAI | 1 |
| Week 1 (2023) | City of Bradford | West Yorkshire | Canada Goose (2) | Branta canadensis | H5N1 HPAI | 2 |
| Week 1 (2023) | Cotswold | Gloucestershire | Common Buzzard (1) | Buteo buteo | H5N1 HPAI | 1 |
| Week 1 (2023) | Durham | Durham | Mute Swan (3) | Cygnus olor | H5N1 HPAI | 3 |
| Week 1 (2023) | Durham | Durham | Greylag Goose (1) | Anser anser | H5N1 HPAI | 1 |
| Week 1 (2023) | Durham | Durham | Canada Goose (1) | Branta canadensis | H5N1 HPAI | 1 |
| Week 1 (2023) | Durham | Durham | Greylag Goose (1) | Anser anser | H5N1 HPAI | 1 |
| Week 1 (2023) | Durham | Durham | Pink Footed Goose (1) | Anser brachyrhynchus | H5N1 HPAI | 1 |
| Week 1 (2023) | Durham | Durham | Greylag Goose (3) | Anser anser | H5N1 HPAI | 3 |
| Week 1 (2023) | East Cambridgeshire | Cambridgeshire | Common Buzzard (1) | Buteo buteo | H5N1 HPAI | 1 |
| Week 1 (2023) | Herefordshire | Herefordshire | Mute Swan (1) | Cygnus olor | H5N1 HPAI | 1 |
| Week 1 (2023) | Milton Keynes | Buckinghamshire | Mute Swan (2) | Cygnus olor | H5N1 HPAI | 2 |
| Week 1 (2023) | North Tyneside | Tyne and Wear | Canada Goose (1) | Branta canadensis | H5N1 HPAI | 1 |
| Week 1 (2023) | North Tyneside | Tyne and Wear | Mute Swan (3) | Cygnus olor | H5N1 HPAI | 3 |
| Week 1 (2023) | Northumberland | Northumberland | Greylag Goose (2) | Anser anser | H5N1 HPAI | 2 |
| Week 1 (2023) | Northumberland | Northumberland | Pink Footed Goose (3) | Anser brachyrhynchus | H5N1 HPAI | 3 |
| Week 1 (2023) | Nuneaton and Bedworth | Warwickshire | Mute Swan (1) | Cygnus olor | H5N1 HPAI | 1 |
| Week 1 (2023) | Nuneaton and Bedworth | Warwickshire | Canada Goose (3) | Branta canadensis | H5N1 HPAI | 3 |
| Week 1 (2023) | Nuneaton and Bedworth | Warwickshire | Canada Goose (3) | Branta canadensis | H5N1 HPAI | 3 |
| Week 1 (2023) | Redcar and Cleveland | North Yorkshire | Greylag Goose (3) | Anser anser | H5N1 HPAI | 3 |
| Week 1 (2023) | Richmondshire | North Yorkshire | Mute Swan (3) | Cygnus olor | H5N1 HPAI | 3 |
| Week 1 (2023) | Richmondshire | North Yorkshire | Greylag Goose (1) | Anser anser | H5N1 HPAI | 1 |
| Week 1 (2023) | Runnymede | Surrey | Greylag Goose (3) | Anser anser | H5N1 HPAI | 3 |
| Week 1 (2023) | Runnymede | Surrey | Canada Goose (1) | Branta canadensis | H5N1 HPAI | 1 |
| Week 1 (2023) | Selby | North Yorkshire | Common Buzzard (1) | Buteo buteo | H5 HPAI | 1 |
| Week 1 (2023) | Stroud | Gloucestershire | Greylag Goose (1) | Anser anser | H5N1 HPAI | 1 |
| Week 1 (2023) | Sunderland City Council | Tyne and Wear | Greylag Goose (1) | Anser anser | H5N1 HPAI | 1 |
| Week 1 (2023) | Sunderland City Council | Tyne and Wear | Greylag Goose (1) | Anser anser | H5N1 HPAI | 1 |
| Week 1 (2023) | Sunderland City Council | Tyne and Wear | Greylag Goose (1) | Anser anser | H5N1 HPAI | 1 |
| Week 1 (2023) | West Lancashire | Lancashire | Whooper Swan (1) | Cygnus cygnus | H5N1 HPAI | 1 |
| Week 1 (2023) | Wiltshire | Wiltshire | Common Buzzard (1) | Buteo buteo | H5N1 HPAI | 1 |
| Week 2 (2023) | East Lothian | East Lothian | Greylag Goose (1) | Anser anser | H5N1 HPAIAI | 1 |
| Week 2 (2023) | East Suffolk | Suffolk | Peregrine (1) | Falco peregrinus | H5N1 HPAIAI | 1 |
| Week 2 (2023) | East Suffolk | Suffolk | Dove Pigeon (1) | Columba livia | H5 HPAI | 1 |
| Week 2 (2023) | Leeds | West Yorkshire | Common Buzzard (1) | Buteo buteo | H5N1 HPAIAI | 1 |
| Week 2 (2023) | North Northamptonshire | Northamptonshire | Mute Swan (2) | Cygnus olor | H5N1 HPAIAI | 2 |
| Week 2 (2023) | Oxford City | Oxfordshire | Canada Goose (2) | Branta canadensis | H5N1 HPAIAI, H5 HPAI | 2 |
| Week 2 (2023) | Perth and Kinross | Perthshire | Unspecified Goose (1) | Not set | H5N1 HPAIAI | 1 |
| Week 2 (2023) | Powys | Powys | Common Buzzard (1) | Buteo buteo | H5N1 HPAIAI | 1 |
| Week 2 (2023) | Rotherham | South Yorkshire | Common Buzzard (1) | Buteo buteo | H5N1 HPAIAI | 1 |
| Week 2 (2023) | Stoke-on-Trent | Staffordshire | Canada Goose (1) | Branta canadensis | H5N1 HPAIAI | 1 |
| Week 2 (2023) | Stratford on Avon | Warwickshire | Common Buzzard (1) | Buteo buteo | H5N1 HPAIAI | 1 |
| Week 2 (2023) | Wakefield Metropolitan | West Yorkshire | Canada Goose (2) | Branta canadensis | H5N1 HPAIAI | 2 |
| Week 2 (2023) | Wakefield Metropolitan | West Yorkshire | Greylag Goose (1) | Anser anser | H5N1 HPAIAI | 1 |
| Week 2 (2023) | Warrington | Cheshire | Mute Swan (1) | Cygnus olor | H5N1 HPAIAI | 1 |
| Week 2 (2023) | Wealden | East Sussex | Common Buzzard (1) | Buteo buteo | H5N1 HPAIAI | 1 |
| Week 2 (2023) | West Lancashire | Lancashire | Pink Footed Goose (1) | Anser brachyrhynchus | H5N1 HPAIAI | 1 |
| Week 2 (2023) | West Lancashire | Lancashire | Pink Footed Goose (1) | Anser brachyrhynchus | H5N1 HPAIAI | 1 |
| Week 2 (2023) | Windsor and Maidenhead | Berkshire | Canada Goose (3) | Branta canadensis | H5N1 HPAIAI | 3 |
| Week 2 (2023) | Windsor and Maidenhead | Berkshire | Common Buzzard (1) | Buteo buteo | H5N1 HPAIAI | 1 |
| Week 3 (2023) | Argyll and Bute | Argyll | Barnacle Goose (6) | Branta leucopsis | H5N1 HPAI | 6 |
| Week 3 (2023) | Broadland | Norfolk | Common Buzzard (1) | Buteo buteo | H5N1 HPAI | 1 |
| Week 3 (2023) | Clackmannanshire | Clackmannanshire | Black Headed Gull (1), Pink Footed Goose (2) | Chroicocephalus ridibundus, Anser brachyrhynchus | H5N1 HPAI | 3 |
| Week 3 (2023) | Dumfries and Galloway | Dumfriesshire | Whooper Swan (1) | Cygnus cygnus | H5N1 HPAI | 1 |
| Week 3 (2023) | East Lothian | East Lothian | Common Buzzard (1) | Buteo buteo | H5N1 HPAI | 1 |
| Week 3 (2023) | Enfield | Greater London | Common Buzzard (1) | Buteo buteo | H5N1 HPAI | 1 |
| Week 3 (2023) | Harrogate | North Yorkshire | Sparrowhawk (1) | Accipiter nisus | H5N1 HPAI | 1 |
| Week 3 (2023) | Perth and Kinross | Kinrossshire | Unspecified Heron (1) | Not set | H5N1 HPAI | 1 |
| Week 3 (2023) | Salford | Greater Manchester | Canada Goose (1) | Branta canadensis | H5N1 HPAI | 1 |
| Week 3 (2023) | Salford | Greater Manchester | Herring Gull (1) | Larus argentatus | H5 HPAI | 1 |
| Week 3 (2023) | South Lanarkshire | Lanarkshire | Mute Swan (1) | Cygnus olor | H5N1 HPAI | 1 |
| Week 3 (2023) | Stockport Metropolitan | Greater Manchester | Common Buzzard (1) | Buteo buteo | H5N1 HPAI | 1 |
| Week 4 (2023) | Basingstoke and Deane | Hampshire | Common Buzzard (1) | Buteo buteo | H5N1 HPAI | 1 |
| Week 4 (2023) | Birmingham City | West Midlands | Peregrine (1) | Falco peregrinus | H5N1 HPAI | 1 |
| Week 4 (2023) | Durham | Durham | Common Buzzard (1) | Buteo buteo | H5N1 HPAI | 1 |
| Week 4 (2023) | Durham | Durham | Sparrowhawk (1) | Accipiter nisus | H5N1 HPAI | 1 |
| Week 4 (2023) | East Lindsey | Lincolnshire | Common Buzzard (1) | Buteo buteo | H5N1 HPAI | 1 |
| Week 4 (2023) | Milton Keynes | Buckinghamshire | Common Buzzard (1) | Buteo buteo | H5N1 HPAI | 1 |
| Week 4 (2023) | North Ayrshire | Bute | Pink Footed Goose (1), Herring Gull (1) | Anser brachyrhynchus, Larus argentatus | H5N1 HPAI | 2 |
| Week 4 (2023) | Perth and Kinross | Kinrossshire | Barn Owl (1), Sparrowhawk (1) | Tyto alba, Accipiter nisus | H5N1 HPAI, H5 HPAI | 2 |
| Week 4 (2023) | South Hams | Devon | Kestrel (1) | Falco tinnunculus | H5 HPAI | 1 |
| Week 5 (2023) | Argyll and Bute | Argyll and Bute | Barnacle Goose (2), Ringed Plover (1), Whooper Swan (1) | Branta leucopsis, Charadrius hiaticula, Cygnus cygnus | H5N1 HPAI | 4 |
| Week 5 (2023) | Cannock Chase | Staffordshire | Tawny Owl (1) | Strix aluco | H5N1 HPAI | 1 |
| Week 5 (2023) | City of Edinburgh | Scotland | Mute Swan (3) | Cygnus olor | H5N1 HPAI | 3 |
| Week 5 (2023) | City of Edinburgh | City of Edinburgh | Common Buzzard (1) | Buteo buteo | H5N1 HPAI | 1 |
| Week 5 (2023) | Cotswold | Gloucestershire | Common Buzzard (1) | Buteo buteo | H5N1 HPAI | 1 |
| Week 5 (2023) | Dumfries and Galloway | Dumfries and Galloway | Barnacle Goose (1) | Branta leucopsis | H5N1 HPAI | 1 |
| Week 5 (2023) | East Riding of Yorkshire | East Riding of Yorkshire | Sparrowhawk (1) | Accipiter nisus | H5N1 HPAI | 1 |
| Week 5 (2023) | Erewash | Derbyshire | Common Buzzard (1) | Buteo buteo | H5N1 HPAI | 1 |
| Week 5 (2023) | Falkirk | Falkirk | Unknown Buzzard (1) | Not set | H5N1 HPAI | 1 |
| Week 5 (2023) | Fife | Fife | Greylag Goose (1) | Anser anser | H5N1 HPAI | 1 |
| Week 5 (2023) | Gwynedd | Gwynedd | Common Buzzard (1) | Buteo buteo | H5N1 HPAI | 1 |
| Week 5 (2023) | Havant | Hampshire | Common Buzzard (1) | Buteo buteo | H5N1 HPAI | 1 |
| Week 5 (2023) | Newcastle under Lyme | Staffordshire | Tawny Owl (1) | Strix aluco | H5N1 HPAI | 1 |
| Week 5 (2023) | North Somerset | Somerset | Tawny Owl (1) | Strix aluco | H5N1 HPAI | 1 |
| Week 5 (2023) | Northumberland | Northumberland | Pink Footed Goose (3) | Anser brachyrhynchus | H5N1 HPAI | 3 |
| Week 5 (2023) | Northumberland | Northumberland | Sparrowhawk (1) | Accipiter nisus | H5N1 HPAI | 1 |
| Week 5 (2023) | Oldham Metropolitan | Greater Manchester | Canada Goose (3) | Branta canadensis | H5N1 HPAI | 3 |
| Week 5 (2023) | Scottish Borders | Scottish Borders | Common Buzzard (1) | Buteo buteo | H5N1 HPAI | 1 |
| Week 5 (2023) | South Oxfordshire | Oxfordshire | Common Buzzard (1) | Buteo buteo | H5N1 HPAI | 1 |
| Week 5 (2023) | Sunderland City Council | Tyne and Wear | Black Headed Gull (1) | Chroicocephalus ridibundus | H5N1 HPAI | 1 |
| Week 5 (2023) | Wyre | Lancashire | Sparrowhawk (1) | Accipiter nisus | H5 HPAI | 1 |
| Week 6 (2023) | Carlisle | Cumbria | Pink Footed Goose (1) | Anser brachyrhynchus | H5N1 HPAI | 1 |
| Week 6 (2023) | Fife | Fife | Unknown Buzzard (1) | Not set | H5N1 HPAI | 1 |
| Week 6 (2023) | Fife | Fife | Unknown Buzzard (1) | Not set | H5N1 HPAI | 1 |
| Week 6 (2023) | Highland | Highland | Common Buzzard (1) | Buteo buteo | H5N1 HPAI | 1 |
| Week 7 (2023) | Aberdeenshire | Aberdeenshire | Pink Footed Goose (4) | Anser brachyrhynchus | H5N1 HPAI | 4 |
| Week 7 (2023) | Argyll and Bute | Argyll and Bute | Barnacle Goose (3) | Branta leucopsis | H5N1 HPAI | 3 |
| Week 7 (2023) | Durham | Durham | Greylag Goose (2) | Anser anser | H5N1 HPAI | 2 |
| Week 7 (2023) | Kings Lynn and West Norfolk | Norfolk | Black-headed Gull (1) | Chroicocephalus ridibundus | H5N1 HPAI | 1 |
| Week 7 (2023) | Peterborough City | Cambridgeshire | Common Buzzard (1) | Buteo buteo | H5 HPAI | 1 |
| Week 7 (2023) | Wakefield Metropolitan | West Yorkshire | Common Buzzard (1) | Buteo buteo | H5N1 HPAI | 1 |
| Week 7 (2023) | Wigan | Greater Manchester | Peregrine (1) | Falco peregrinus | H5N1 HPAI | 1 |
| Week 8 (2023) | Cheshire West and Chester | Cheshire | Common Buzzard (1) | Buteo buteo | H5N1 HPAI | 1 |
| Week 8 (2023) | City of Edinburgh | City of Edinburgh | Pink Footed Goose (3) | Anser brachyrhynchus | H5N1 HPAI | 3 |
| Week 8 (2023) | Durham | Durham | Common Buzzard (1) | Buteo buteo | H5N1 HPAI | 1 |
| Week 8 (2023) | Durham | Durham | Pink Footed Goose (1) | Anser brachyrhynchus | H5N1 HPAI | 1 |
| Week 8 (2023) | East Riding of Yorkshire | East Riding of Yorkshire | Common Buzzard (1) | Buteo buteo | H5N1 HPAI | 1 |
| Week 8 (2023) | Fife | Fife | Pink Footed Goose (1) | Anser brachyrhynchus | H5N1 HPAI | 1 |
| Week 8 (2023) | Fife | Fife | Common Buzzard (1) | Buteo buteo | H5N1 HPAI | 1 |
| Week 8 (2023) | Hambleton | North Yorkshire | Common Buzzard (1) | Buteo buteo | H5N1 HPAI | 1 |
| Week 8 (2023) | Harrogate | North Yorkshire | Unspecified Bird of Prey (1) | Not set | H5N1 HPAI | 1 |
| Week 8 (2023) | Highland | Highland | Pink Footed Goose (1) | Anser brachyrhynchus | H5N1 HPAI | 1 |
| Week 8 (2023) | Powys | Powys | Common Buzzard (1) | Buteo buteo | H5N1 HPAI | 1 |
| Week 8 (2023) | Richmondshire | North Yorkshire | Common Buzzard (1) | Buteo buteo | H5N1 HPAI | 1 |
| Week 8 (2023) | Stratford on Avon | Warwickshire | Teal (1) | Anas crecca | H5N1 HPAI | 1 |
| Week 8 (2023) | Vale of White Horse District | Oxfordshire | Common Buzzard (1) | Buteo buteo | H5N1 HPAI | 1 |
| Week 9 (2023) | Aberdeenshire | Aberdeenshire | Pink Footed Goose (1) | Anser brachyrhynchus | H5N1 HPAI | 1 |
| Week 9 (2023) | Allerdale | Cumbria | Pink Footed Goose (1) | Anser brachyrhynchus | H5N1 HPAI | 1 |
| Week 9 (2023) | Broadland | Norfolk | Peregrine (2) | Falco peregrinus | H5N1 HPAI | 2 |
| Week 9 (2023) | Buckinghamshire | Buckinghamshire | Common Buzzard (1) | Buteo buteo | H5N1 HPAI | 1 |
| Week 9 (2023) | Cheshire East | Cheshire | Common Buzzard (1) | Buteo buteo | H5N1 HPAI | 1 |
| Week 9 (2023) | Cheshire West and Chester | Cheshire | Pink Footed Goose (1) | Anser brachyrhynchus | H5N1 HPAI | 1 |
| Week 9 (2023) | City of Edinburgh | City of Edinburgh | Sparrowhawk (1) | Accipiter nisus | H5N1 HPAI | 1 |
| Week 9 (2023) | Falkirk | Falkirk | Pink Footed Goose (1) | Anser brachyrhynchus | H5N1 HPAI | 1 |
| Week 9 (2023) | Fife | Fife | Common Buzzard (1) | Buteo buteo | H5N1 HPAI | 1 |
| Week 9 (2023) | Hinckley and Bosworth | Leicestershire | Common Buzzard (1) | Buteo buteo | H5N1 HPAI | 1 |
| Week 9 (2023) | Mid Suffolk | Suffolk | Sparrowhawk (1) | Accipiter nisus | H5N1 HPAI | 1 |
| Week 9 (2023) | North Lincolnshire | Lincolnshire | Common Buzzard (1) | Buteo buteo | H5N1 HPAI | 1 |
| Week 9 (2023) | Northumberland | Northumberland | Common Buzzard (1) | Buteo buteo | H5N1 HPAI | 1 |
| Week 9 (2023) | Northumberland | Northumberland | Pink Footed Goose (1) | Anser brachyrhynchus | H5N1 HPAI | 1 |
| Week 9 (2023) | Redcar and Cleveland | North Yorkshire | Mute Swan (1) | Cygnus olor | H5N1 HPAI | 1 |
| Week 9 (2023) | Shropshire | Shropshire | Common Buzzard (1) | Buteo buteo | H5N1 HPAI | 1 |
| Week 9 (2023) | West Lancashire | Lancashire | Pink Footed Goose (1) | Anser brachyrhynchus | H5N1 HPAI | 1 |
| Week 9 (2023) | Windsor and Maidenhead | Berkshire | Canada Goose (2) | Branta canadensis | H5N1 HPAI | 2 |
| Week 9 (2023) | Wyre | Lancashire | Pink Footed Goose (1) | Anser brachyrhynchus | H5N1 HPAI | 1 |
| Week 10 (2023) | Braintree | Essex | Mute Swan (1) | Cygnus olor | H5 HPAI | 1 |
| Week 10 (2023) | Carlisle | Cumbria | Pink Footed Goose (1) | Anser brachyrhynchus | H5N1 HPAI | 1 |
| Week 10 (2023) | Durham | Durham | Greylag Goose (2) | Anser anser | H5N1 HPAI | 2 |
| Week 10 (2023) | High Peak | Derbyshire | Common Buzzard (1) | Buteo buteo | H5N1 HPAI | 1 |
| Week 10 (2023) | Richmond upon Thames | Greater London | Black Headed Gull (1) | Chroicocephalus ridibundus | H5N1 HPAI | 1 |
| Week 10 (2023) | Sefton | Merseyside | Pink Footed Goose (1) | Anser brachyrhynchus | H5N1 HPAI | 1 |
| Week 10 (2023) | South Kesteven | Lincolnshire | Greylag Goose (1) | Anser anser | H5 HPAI | 1 |
| Week 10 (2023) | St Albans | Hertfordshire | Mute Swan (1) | Cygnus olor | H5N1 HPAI | 1 |
| Week 10 (2023) | Test Valley | Hampshire | Canada Goose (1) | Branta canadensis | H5N1 HPAI | 1 |
| Week 11 (2023) | Carlisle | Cumbria | Pink Footed Goose (1) | Anser brachyrhynchus | H5N1 HPAI | 1 |
| Week 11 (2023) | East Lothian | East Lothian | Common Buzzard (1) | Buteo buteo | H5N1 HPAI | 1 |
| Week 11 (2023) | East Riding of Yorkshire | East Riding of Yorkshire | Common Buzzard (3) | Buteo buteo | H5N1 HPAI | 3 |
| Week 11 (2023) | East Riding of Yorkshire | East Riding of Yorkshire | Carrion Crow (1) | Corvus corone | H5N1 HPAI | 1 |
| Week 11 (2023) | Eastleigh | Hampshire | Sparrowhawk (1) | Accipiter nisus | H5N1 HPAI | 1 |
| Week 11 (2023) | Eden | Cumbria | Pink Footed Goose (1) | Anser brachyrhynchus | H5N1 HPAI | 1 |
| Week 11 (2023) | Preston City | Lancashire | Common Gull (1) | Larus canus | H5N1 HPAI | 1 |
| Week 11 (2023) | Scottish Borders | Scottish Borders | Pink Footed Goose (1) | Anser brachyrhynchus | H5N1 HPAI | 1 |
| Week 11 (2023) | Wiltshire | Wiltshire | Common Buzzard (1) | Buteo buteo | H5 HPAI | 1 |
| Week 12 (2023) | Ashford | Kent | Goshawk (1) | Accipiter gentilis | H5N1 HPAI | 1 |
| Week 12 (2023) | Dacorum | Hertfordshire | Mute Swan (1) | Cygnus olor | H5 HPAI | 1 |
| Week 12 (2023) | East Suffolk | Suffolk | Peregrine (1) | Falco peregrinus | H5 HPAI | 1 |
| Week 12 (2023) | East Suffolk | Suffolk | Herring Gull (1) | Larus argentatus | H5 HPAI | 1 |
| Week 12 (2023) | Solihull Metropolitan | West Midlands | Black Headed Gull (1) | Chroicocephalus ridibundus | H5N1 HPAI | 1 |
| Week 12 (2023) | Stirling | Stirling | Pink Footed Goose (1) | Anser brachyrhynchus | H5N1 HPAI | 1 |
| Week 12 (2023) | Solihull Metropolitan | West Midlands | Black Headed Gull (1) | Chroicocephalus ridibundus | H5N1 HPAI | 1 |
| Week 13 (2023) | Ashmore | Dorset | Common Buzzard (1) | Buteo buteo | H5 HPAI | 1 |
| Week 13 (2023) | Northumberland | Northumberland | Peregrine Falcon (1) | Falco peregrinus | H5N1 HPAI | 1 |
| Week 13 (2023) | Stirling | Stirling | Common Buzzard (1) | Buteo buteo | H5N1 HPAI | 1 |
| Week 13 (2023) | West Lancashire | Lancashire | Mallard duck (1) | Anas platyrhynchos | H5 HPAI | 1 |
| Week 13 (2023) | Rutland | Leicestershire | Black Headed Gull (3) | Chroicocephalus ridibundus | H5N1 HPAI | 3 |
| Week 13 (2023) | Charnwood | Leicestershire | Black Headed Gull (5) | Chroicocephalus ridibundus | H5N1 HPAI | 5 |
| Week 13 (2023) | Ryedale | North Yorkshire | Common Buzzard (1) | Buteo buteo | H5N1 HPAI | 1 |
| Week 13 (2023) | West Berkshire | Berkshire | Unspecified duck (1) | Not set | H5 HPAI | 1 |
| Week 13 (2023) | Dorset | Dorset | Herring gull (1) | Larus argentatus | H5N1 HPAI | 1 |
| Week 14 (2023) | Dumfries and Galloway | Dumfries and Galloway | Pink Footed Goose (1) | Anser brachyrhynchus | H5N1 HPAI | 1 |
| Week 14 (2023) | Northumberland | Northumberland | Great Black Backed Gull (1), Herring Gull (2) | Larus marinus, Larus argentatus | H5N1 HPAI | 3 |
| Week 14 (2023) | Leeds | West Yorkshire | Common Buzzard (2) | Buteo buteo | H5N1 HPAI, H5 HPAI | 2 |
| Week 15 (2023) | Westmorland and Furness | Cumbria | Common Buzzard (1) | Buteo buteo | H5N1 HPAI | 1 |
| Week 16 (2023) | Carmarthenshire | Carmarthenshire | Lesser black-backed gull (1) | Larus fuscus | H5N1 HPAI | 1 |
| Week 16 (2023) | Cheshire West and Chester | Cheshire | Canada Goose (1) | Branta canadensis | H5N1 HPAI | 1 |
| Week 16 (2023) | Doncaster Metropolitan Borough | South Yorkshire | Common Buzzard (1) | Buteo buteo | H5N1 HPAI | 1 |
| Week 16 (2023) | Dorset | Dorset | Unspecified duck (1) | Not set | H5N1 HPAI | 1 |
| Week 16 (2023) | Great Yarmouth | Norfolk | Herring Gull (1) | Larus argentatus | H5N1 HPAI | 1 |
| Week 16 (2023) | Huntingdonshire | Cambridgeshire | Herring Gull (1) | Larus argentatus | H5N1 HPAI | 1 |
| Week 16 (2023) | Leeds | West Yorkshire | Black Headed Gull (3) | Chroicocephalus ridibundus | H5N1 HPAI | 3 |
| Week 16 (2023) | North Kesteven | Lincolnshire | Black Headed Gull (3) | Chroicocephalus ridibundus | H5N1 HPAI | 3 |
| Week 16 (2023) | North Northamptonshire | Northamptonshire | Black Headed Gull (3) | Chroicocephalus ridibundus | H5N1 HPAI | 3 |
| Week 16 (2023) | North Warwickshire | Warwickshire | Black Headed Gull (1) | Chroicocephalus ridibundus | H5N1 HPAI | 1 |
| Week 16 (2023) | North Warwickshire | Warwickshire | Black Headed Gull (2) | Chroicocephalus ridibundus | H5N1 HPAI | 2 |
| Week 16 (2023) | South Kesteven | Lincolnshire | Herring Gull (1) | Larus argentatus | H5N1 HPAI | 1 |
| Week 16 (2023) | Stafford | Staffordshire | Canada Goose (1) | Branta canadensis | H5 HPAI | 1 |
| Week 16 (2023) | West Berkshire | Berkshire | Black Headed Gull (2) | Chroicocephalus ridibundus | H5N1 HPAI | 2 |
| Week 16 (2023) | West Berkshire | Berkshire | Black Headed Gull (1) | Chroicocephalus ridibundus | H5N1 HPAI | 1 |
| Week 17 (2023) | Derbyshire Dales | Derbyshire | Black Headed Gull (1) | Chroicocephalus ridibundus | H5N1 HPAI | 1 |
| Week 17 (2023) | North Northamptonshire | Northamptonshire | Black Headed Gull (1) | Chroicocephalus ridibundus | H5N1 HPAI | 1 |
| Week 17 (2023) | Perth and Kinross | Perth and Kinross | Tawny Owl (1) | Strix aluco | H5N1 HPAI | 1 |
| Week 17 (2023) | Stroud | Gloucestershire | Black Headed Gull (2) | Chroicocephalus ridibundus | H5N1 HPAI | 2 |
| Week 17 (2023) | Tewkesbury | Gloucestershire | Common Buzzard (1) | Buteo buteo | H5N1 HPAI | 1 |
| Week 17 (2023) | West Berkshire | Berkshire | Black Headed Gull (2) | Chroicocephalus ridibundus | H5N1 HPAI | 2 |
| Week 17 (2023) | West Lancashire | Lancashire | Black Headed Gull (5) | Chroicocephalus ridibundus | H5N1 HPAI | 5 |
| Week 17 (2023) | Wirral | Merseyside | Peregrine (1) | Falco peregrinus | H5N1 HPAI | 1 |
| Week 17 (2023) | Wychavon | Worcestershire | Black Headed Gull (3) | Chroicocephalus ridibundus | H5N1 HPAI | 3 |
| Week 18 (2023) | Barnsley | South Yorkshire | Black Headed Gull (3) | Chroicocephalus ridibundus | H5N1 HPAI | 3 |
| Week 18 (2023) | Bedford | Bedfordshire | Black Headed Gull (2) | Chroicocephalus ridibundus | H5N1 HPAI | 2 |
| Week 18 (2023) | Buckinghamshire | Buckinghamshire | Red Kite (1) | Milvus milvus | H5N1 HPAI | 1 |
| Week 18 (2023) | East Hertfordshire | Hertfordshire | Black Headed Gull (3) | Chroicocephalus ridibundus | H5N1 HPAI | 3 |
| Week 18 (2023) | Eastbourne | East Sussex | Herring Gull (1) | Larus argentatus | H5N1 HPAI | 1 |
| Week 18 (2023) | Stroud | Gloucestershire | Black Headed Gull (5) | Chroicocephalus ridibundus | H5N1 HPAI | 5 |
| Week 19 (2023) | Arun | West Sussex | Black Headed Gull (2) | Chroicocephalus ridibundus | H5N1 HPAI | 2 |
| Week 19 (2023) | Bassetlaw | Nottinghamshire | Black Headed Gull (3) | Chroicocephalus ridibundus | H5N1 HPAI, H5 HPAI | 3 |
| Week 19 (2023) | Bassetlaw | Nottinghamshire | Black Headed Gull (2) | Chroicocephalus ridibundus | H5N1 HPAI | 2 |
| Week 19 (2023) | Boston | Lincolnshire | Black Headed Gull (1) | Chroicocephalus ridibundus | H5N1 HPAI | 1 |
| Week 19 (2023) | Carmarthenshire | Carmarthenshire | Black Headed Gull (1) | Chroicocephalus ridibundus | H5N1 HPAI | 1 |
| Week 19 (2023) | East Riding of Yorkshire | East Riding of Yorkshire | Black Headed Gull (3) | Chroicocephalus ridibundus | H5N1 HPAI | 3 |
| Week 19 (2023) | Huntingdonshire | Cambridgeshire | Unspecified Gull (1) | Not set | H5N1 HPAI | 1 |
| Week 19 (2023) | Leicester City | Leicestershire | Wood Pigeon (1) | Columba palumbus | H5 HPAI | 1 |
| Week 19 (2023) | North West Leicestershire | Leicestershire | Black Headed Gull (3) | Chroicocephalus ridibundus | H5N1 HPAI | 3 |
| Week 19 (2023) | North West Leicestershire | Leicestershire | Black Headed Gull (3) | Chroicocephalus ridibundus | H5N1 HPAI | 3 |
| Week 19 (2023) | North Yorkshire | North Yorkshire | Black Headed Gull (3) | Chroicocephalus ridibundus | H5N1 HPAI | 3 |
| Week 19 (2023) | Rugby | Warwickshire | Black Headed Gull (1) | Chroicocephalus ridibundus | H5N1 HPAI | 1 |
| Week 19 (2023) | Stockport Metropolitan | Greater Manchester | Peregrine (1) | Falco peregrinus | H5N1 HPAI | 1 |
| Week 20 (2023) | Oldham Metropolitan | Greater Manchester | Black Headed Gull (3) | Chroicocephalus ridibundus | H5N1 HPAI | 3 |
| Week 20 (2023) | Doncaster Metropolitan Borough | South Yorkshire | Black Headed Gull (1) | Chroicocephalus ridibundus | H5 HPAI | 1 |
| Week 20 (2023) | Doncaster Metropolitan Borough | South Yorkshire | Black Headed Gull (2) | Chroicocephalus ridibundus | H5N1 HPAI | 2 |
| Week 20 (2023) | Fareham | Hampshire | Black Headed Gull (4) | Chroicocephalus ridibundus | H5N1 HPAI | 4 |
| Week 20 (2023) | Cornwall | Cornwall | Herring Gull (1) | Larus argentatus | H5N1 HPAI | 1 |
| Week 20 (2023) | Anglesey | Anglesey | Black Headed Gull (2) | Chroicocephalus ridibundus | H5N1 HPAI | 2 |
| Week 20 (2023) | Cheshire West and Chester | Cheshire | Black Headed Gull (5) | Chroicocephalus ridibundus | H5N1 HPAI | 5 |
| Week 20 (2023) | Waverley | Surrey | Black Headed Gull (1) | Chroicocephalus ridibundus | H5N1 HPAI | 1 |
| Week 20 (2023) | Flintshire | Flintshire | Common Tern (1) | Sterna Hirundo | H5N1 HPAI | 1 |
| Week 20 (2023) | Flintshire | Flintshire | Black Headed Gull (1) | Chroicocephalus ridibundus | H5N1 HPAI | 1 |
| Week 20 (2023) | Flintshire | Flintshire | Black Headed Gull (1) | Chroicocephalus ridibundus | H5 HPAI | 1 |
| Week 20 (2023) | Newark and Sherwood | Nottinghamshire | Black Headed Gull (3) | Chroicocephalus ridibundus | H5N1 HPAI | 3 |
| Week 20 (2023) | Leeds | West Yorkshire | Black Headed Gull (3) | Chroicocephalus ridibundus | H5N1 HPAI | 3 |
| Week 20 (2023) | St Helens | Merseyside | Black Headed Gull (1) | Chroicocephalus ridibundus | H5N1 HPAI | 1 |
| Week 20 (2023) | Anglesey | Anglesey | Common Tern (1) | Sterna Hirundo | H5N1 HPAI | 1 |
| Week 21 (2023) | Southport | Merseyside | Black Headed Gull (1) | Chroicocephalus ridibundus | H5N1 HPAI | 1 |
| Week 21 (2023) | East Suffolk | Suffolk | Peregrine (2) | Falco peregrinus | H5N1 HPAI | 2 |
| Week 21 (2023) | Rutland | Rutland | Black Headed Gull (3); Common Tern (2) | Chroicocephalus ridibundus, Sterna Hirundo | H5N1 HPAI | 5 |
| Week 21 (2023) | Cornwall | Cornwall | Herring Gull (1) | Larus argentatus | H5N1 HPAI | 1 |
| Week 21 (2023) | High Peak | Derbyshire | Black Headed Gull (2) | Chroicocephalus ridibundus | H5N1 HPAI | 2 |
| Week 21 (2023) | Sefton | Merseyside | Black Headed Gull (1) | Chroicocephalus ridibundus | H5N1 HPAI | 1 |
| Week 21 (2023) | Stockport | Greater Manchester | Black Headed Gull (1) | Chroicocephalus ridibundus | H5N1 HPAI | 1 |
| Week 21 (2023) | West Lancashire | Lancashire | Black Headed Gull (1) | Chroicocephalus ridibundus | H5N1 HPAI | 1 |
| Week 21 (2023) | London Borough of Richmond upon Thames | Greater London | Black Headed Gull (1) | Chroicocephalus ridibundus | H5N1 HPAI | 1 |
| Week 21 (2023) | Cornwall | Cornwall | Herring Gull (1) | Larus argentatus | H5 HPAI | 1 |
| Week 21 (2023) | Carmarthenshire | Carmarthenshire | Herring Gull (1) | Larus argentatus | H5N1 HPAI | 1 |
| Week 21 (2023) | Lincolnshire | Lincolnshire | Black Headed Gull (1) | Chroicocephalus ridibundus | H5 HPAI | 1 |
| Week 22 (2023) | Anglesey | Anglesey | Sandwich Tern (2), Arctic Tern (1) | Sterna sandvicensis, Sterna paradisaea | H5N1 HPAI | 3 |
| Week 22 (2023) | Cumberland | Cumbria | Black Headed Gull (3) | Chroicocephalus ridibundus | H5N1 HPAI, H5 HPAI | 3 |
| Week 22 (2023) | Liverpool City | Merseyside | Herring Gull (1) | Larus argentatus | H5 HPAI | 1 |
| Week 22 (2023) | North Northamptonshire | Northamptonshire | Peregrine (3) | Falco peregrinus | H5N1 HPAI | 3 |
| Week 22 (2023) | Northumberland | Northumberland | Black Headed Gull (1) | Chroicocephalus ridibundus | H5N1 HPAI | 1 |
| Week 22 (2023) | Pembrokeshire | Pembrokeshire | Black Headed Gull (1) | Chroicocephalus ridibundus | H5N1 HPAI | 1 |
| Week 22 (2023) | Sefton | Merseyside | Herring Gull (1), Black Headed Gull (3) | Larus argentatus, Chroicocephalus ridibundus | H5N1 HPAI, H5 HPAI | 4 |
| Week 22 (2023) | Westmorland and Furness | Cumbria | Herring Gull (3) | Larus argentatus | H5N1 HPAI, H5 HPAI | 3 |
| Week 23 (2023) | Blackburn with Darwen Borough | Lancashire | Black Headed Gull (3) | Chroicocephalus ridibundus | H5N1 HPAI | 3 |
| Week 23 (2023) | Buckinghamshire | Buckinghamshire | Black Headed Gull (2) | Chroicocephalus ridibundus | H5 HPAI | 2 |
| Week 23 (2023) | Carmarthenshire | Carmarthenshire | Black Headed Gull (1) | Chroicocephalus ridibundus | H5N1 HPAI | 1 |
| Week 23 (2023) | City of Bradford | West Yorkshire | Herring Gull (1) | Larus argentatus | H5N1 HPAI | 1 |
| Week 23 (2023) | Dacorum | Hertfordshire | Black Headed Gull (3) | Chroicocephalus ridibundus | H5N1 HPAI | 3 |
| Week 23 (2023) | Dorset | Dorset | Herring Gull (1) | Larus argentatus | H5N1 HPAI | 1 |
| Week 23 (2023) | Durham | Durham | Black Headed Gull (2) | Chroicocephalus ridibundus | H5N1 HPAI, H5 HPAI | 2 |
| Week 23 (2023) | East Suffolk | Suffolk | Black Headed Gull (1), Sandwich Tern (1) | Chroicocephalus ridibundus, Sterna sandvicensis | H5N1 HPAI | 2 |
| Week 23 (2023) | Maldon | Essex | Peregrine (1) | Falco peregrinus | H5N1 HPAI | 1 |
| Week 23 (2023) | Northumberland | Northumberland | Sandwich Tern (1), Common Tern (1), Black Headed Gull (1) | Sterna sandvicensis, Sterna hirundo, Chroicocephalus ridibundus | H5N1 HPAI, H5 HPAI | 3 |
| Week 23 (2023) | Sefton | Merseyside | Common Tern (3) | Sterna hirundo | H5N1 HPAI | 3 |
| Week 23 (2023) | St Albans | Hertfordshire | Tawny Owl (1) | Strix aluco | H5 HPAI | 1 |
| Week 23 (2023) | Stroud | Gloucestershire | Black Headed Gull (1) | Chroicocephalus ridibundus | H5N1 HPAI | 1 |
| Week 23 (2023) | Sunderland City Council | Tyne and Wear | Black Headed Gull (2) | Chroicocephalus ridibundus | H5N1 HPAI | 2 |
| Week 23 (2023) | Westmorland and Furness | Cumbria | Black Headed Gull (3), Herring Gull (2) | Chroicocephalus ridibundus, Larus argentatus | H5N1 HPAI | 5 |
| Week 23 (2023) | Wigan | Greater Manchester | Black Headed Gull (1) | Chroicocephalus ridibundus | H5N1 HPAI | 1 |
| Week 24 (2023) | Bedford | Bedfordshire | Black Headed Gull (1) | Chroicocephalus ridibundus | H5N1 HPAI | 1 |
| Week 24 (2023) | Carmarthenshire | Carmarthenshire | Black Headed Gull (6) | Chroicocephalus ridibundus | H5N1 HPAI, H5 HPAI | 6 |
| Week 24 (2023) | East Suffolk | Suffolk | Herring Gull (1) | Larus argentatus | H5N1 HPAI | 1 |
| Week 24 (2023) | King's Lynn and West Norfolk | Norfolk | Black Headed Gull (3) | Chroicocephalus ridibundus | H5N1 HPAI | 3 |
| Week 24 (2023) | Maldon | Essex | Black Headed Gull (2) | Chroicocephalus ridibundus | H5N1 HPAI | 2 |
| Week 24 (2023) | North Norfolk | Norfolk | Common Tern (3) | Sterna hirundo | H5N1 HPAI, H5 HPAI | 3 |
| Week 24 (2023) | Northumberland | Northumberland | Herring Gull (1), Black Headed Gull (1) | Larus argentatus, Chroicocephalus ridibundus | H5 HPAI | 2 |
| Week 24 (2023) | Sefton | Merseyside | Herring Gull (1) | Larus argentatus | H5N1 HPAI | 1 |
| Week 24 (2023) | Westmorland and Furness | Cumbria | Black Headed Gull (3) | Chroicocephalus ridibundus | H5N1 HPAI | 3 |
| Week 25 (2023) | Carmarthenshire | Carmarthenshire | Black Headed Gull (5) | Chroicocephalus ridibundus | H5N1 HPAI, H5 HPAI | 5 |
| Week 25 (2023) | King's Lynn and West Norfolk | Norfolk | Herring Gull (1) | Larus argentatus | H5N1 HPAI | 1 |
| Week 25 (2023) | Northumberland | Northumberland | Black Headed Gull (8) | Chroicocephalus ridibundus | H5N1 HPAI | 8 |
| Week 25 (2023) | Pembrokeshire | Pembrokeshire | Unspecified crow (1) | Not set | H5 HPAI | 1 |
| Week 25 (2023) | Rotherham | South Yorkshire | Reed Warbler (1) | Acrocephalus scirpaceus | H5N1 HPAI | 1 |
| Week 25 (2023) | Sunderland City Council | Tyne and Wear | Black Headed Gull (1) | Chroicocephalus ridibundus | H5 HPAI | 1 |
| Week 25 (2023) | Swansea | Swansea | Black Headed Gull (1) | Chroicocephalus ridibundus | H5N1 HPAI | 1 |
| Week 26 (2023) | Aberdeenshire | Aberdeenshire | Sandwich Tern (4), Black Headed Gull (4), Unspecified Gull (3) | Sterna sandvicensis, Chroicocephalus ridibundus | H5N1 HPAI, H5 HPAI | 11 |
| Week 26 (2023) | Carlisle | Cumbria | Black Headed Gull (2) | Chroicocephalus ridibundus | H5N1 HPAI | 2 |
| Week 26 (2023) | Dorset | Dorset | Common Tern (3), Sandwich Tern (2) | Sterna hirundo, Sterna sandvicensis | H5N1 HPAI | 5 |
| Week 26 (2023) | Flintshire | Flintshire | Herring Gull (1) | Larus argentatus | H5 HPAI | 1 |
| Week 26 (2023) | Hampshire | Hampshire | Common Tern (3), Black Headed Gull (1) | Sterna hirundo, Chroicocephalus ridibundus | H5N1 HPAI | 4 |
| Week 26 (2023) | Kings Lynn and West Norfolk | Norfolk | Sandwich Tern (2), Mediterranean Gull (1) | Sterna sandvicensis, Larus melanocephalus | H5N1 HPAI | 3 |
| Week 26 (2023) | Lancashire | Lancashire | Common Tern (3) | Sterna hirundo | H5N1 HPAI | 3 |
| Week 26 (2023) | Stockport Metropolitan | Greater Manchester | Canada Goose (1) | Branta canadensis | H5 HPAI | 1 |
| Week 26 (2023) | Sunderland | Tyne and Wear | Common Tern (1) | Sterna hirundo | H5N1 HPAI | 1 |
| Week 26 (2023) | Tameside Metropolitan | Greater Manchester | Herring Gull (1) | Larus argentatus | H5N1 HPAI | 1 |
| Week 26 (2023) | Thurrock | Essex | Black Headed Gull (1) | Chroicocephalus ridibundus | H5N1 HPAI | 1 |
| Week 27 (2023) | Aberdeen City | Aberdeenshire | Kittiwake (1) | Rissa tridactyla | H5N1 HPAI | 1 |
| Week 27 (2023) | Aberdeenshire | Aberdeenshire | Kittiwake (6), Guillemot (2), Herring Gull (1), Unspecified Gull (3) | Rissa tridactyla, Uria aalge, Larus argentatus | H5N1 HPAI | 12 |
| Week 27 (2023) | Arun | West Sussex | Black Headed Gull (1) | Chroicocephalus ridibundus | H5 HPAI | 1 |
| Week 27 (2023) | City of Edinburgh | City of Edinburgh | Common Tern (3) | Sterna Hirundo | H5N1 HPAI | 3 |
| Week 27 (2023) | Cumberland | Cumbria | Herring Gull (2), Black Headed Gull (2) | Larus argentatus, Chroicocephalus ridibundus | H5N1 HPAI | 4 |
| Week 27 (2023) | Fife | Fife | Kittiwake (2) | Rissa tridactyla | H5N1 HPAI | 2 |
| Week 27 (2023) | Hampshire | Hampshire | Common Tern (1), Black Headed Gull (1) | Sterna Hirundo, Chroicocephalus ridibundus | H5N1 HPAI | 2 |
| Week 27 (2023) | Isle of Anglesey | Anglesey | Common Tern (2), Guillemot (1) | Sterna Hirundo, Uria aalge | H5N1 HPAI | 3 |
| Week 27 (2023) | North Tyneside | Tyne and Wear | Herring Gull (2) | Larus argentatus | H5N1 HPAI | 2 |
| Week 27 (2023) | North Yorkshire | North Yorkshire | Common Gull (1) | Larus canus | H5N1 HPAI | 1 |
| Week 27 (2023) | Northumberland | Northumberland | Black Headed Gull (1), Herring Gull (1), Commone Tern (3), Kittiwake (1) | Chroicocephalus ridibundus, Larus argentatus, Sterna Hirundo, Rissa tridactyla | H5N1 HPAI, H5 HPAI | 6 |
| Week 27 (2023) | Scottish Borders | Scottish Borders | Kittiwake (2) | Rissa tridactyla | H5N1 HPAI | 2 |
| Week 27 (2023) | South Tyneside | Tyne and Wear | Herring Gull (1) | Larus argentatus | H5N1 HPAI | 1 |
| Week 28 (2023) | Aberdeen City | Aberdeenshire | Guillemot (3) | Uria aalge | H5N1 HPAI | 3 |
| Week 28 (2023) | Aberdeenshire | Aberdeenshire | Arctic Tern (2), Common Tern (2), Guillemot (7), Herring Gull (6), Kittiwake (1), Razorbill (1), Unspecified Gull (2) | Sterna paradisaea, Sterna hirundo, Uria aalge, Larus argentatus, Rissa tridactyla, Alca torda | H5N1 HPAI, H5 HPAI | 21 |
| Week 28 (2023) | Anglesey | Anglesey | Guillemot (4), Herring Gull (1) | Uria aalge, Larus argentatus | H5N1 HPAI, H5 H{AI | 5 |
| Week 28 (2023) | Angus | Angus | Guillemot (5) | Uria aalge | H5N1 HPAI | 5 |
| Week 28 (2023) | Arun | Arun | Mediterranean Gull (1) | Larus melanocephalus | H5 HPAI | 1 |
| Week 28 (2023) | Blackpool | Lancashire | Guillemot (2) | Uria aalge | H5N1 HPAi | 2 |
| Week 28 (2023) | Carmarthenshire | Carmarthenshire | Guillemot (1) | Uria aalge | H5N1 HPAI | 1 |
| Week 28 (2023) | Colchester | Essex | Black Headed Gull (1) | Chroicocephalus ridibundus | H5N1 HPAi | 1 |
| Week 28 (2023) | Cumberland | Cumbria | Guillemot (1), Herring Gull (1), Black Headed Gull (1) | Uria aalge, Larus argentatus, Chroicocephalus ridibundus | H5N1 HPAI, H5 HPAI | 3 |
| Week 28 (2023) | Devon | Devon | Herring Gull (2), Puffin (1) | Larus argentatus, Fratercula arctica | H5N1 HPAI | 3 |
| Week 28 (2023) | East Ayrshire | East Ayrshire | Black Headed Gull (2) | Chroicocephalus ridibundus | H5N1 HPAI | 2 |
| Week 28 (2023) | Fife | Fife | Herring Gull (1) | Larus argentatus | H5N1 HPAI | 1 |
| Week 28 (2023) | Lancashire | Lancashire | Guillemot (2) | Uria aalge | H5N1 HPAi | 2 |
| Week 28 (2023) | Manchester City | Greater Manchester | Grey Heron (1) | Ardea cinerea | H5 HPAI | 1 |
| Week 28 (2023) | Norfolk | Norfolk | Black Headed Gull (1) | Chroicocephalus ridibundus | H5N1 HPAI | 1 |
| Week 28 (2023) | North Yorkshire | North Yorkshire | Black Headed Gull (3), Herring Gull (1) | Larus argentatus, Chroicocephalus ridibundus | H5N1 HPAI | 4 |
| Week 28 (2023) | Northumberland | Northumberland | Little Tern (1), Arctic Tern (1), Kittiwake (1) | Sternula albifrons, Sterna paradisaea, Rissa tridactyla | H5N1 HPAI | 3 |
| Week 28 (2023) | Pembrokeshire | Pembrokeshire | Guillemot (2) | Uria aalge | H5N1 HPAI | 2 |
| Week 28 (2023) | Sefton Metropolitan | Merseyside | Guillemot (10), Herring Gull (1) | Uria aalge, Larus argentatus | H5N1 HPAI | 11 |
| Week 28 (2023) | Southampton City | Hampshire | Black Headed Gull (2) | Chroicocephalus ridibundus | H5N1 HPAI | 2 |
| Week 28 (2023) | Sunderland City | Tyne and Wear | Herring Gull (1) | Larus argentatus | H5N1 HPAI | 1 |
| Week 28 (2023) | The Highland | Highlands | Unspecified Gull (7) | Not set | H5N1 HPAI | 7 |
| Week 28 (2023) | The Moray | Moray | Herring Gull (2), Unspecified Gull (2) | Larus argentatus | H5N1 HPAI | 4 |
| Week 28 (2023) | Westmorland and Furness | Cumbria | Guillemot (1) | Uria aalge | H5N1 HPAI | 1 |
| Week 29 (2023) | Aberdeen | Aberdeen | Kittiwake (1) | Rissa tridactyla | H5N1 HPAI | 1 |
| Week 29 (2023) | Aberdeen City | Aberdeenshire | Guillemot (2) | Uria aalge | H5N1 HPAI | 2 |
| Week 29 (2023) | Aberdeenshire | Aberdeenshire | Kittiwake (12), Herring Gull (4), Guillemot (13), Razorbill (3), Shag (1), Unspecified Gull (2) | Rissa tridactyla, Larus argentatus, Uria aalge, Alca torda, Gulosus aristotelis | H5N1 HPAI, H5 HPAI | 35 |
| Week 29 (2023) | Anglesey | Anglesey | Black Headed Gull (1), Herring Gull (1), Guillemot (2) | Larus argentatus, Chroicocephalus ridibundus, Uria aalge | H5N1 HPAI | 4 |
| Week 29 (2023) | Angus | Angus | Guillemot (8), Herring Gull (3), Unspecified Gull (1) | Uria aalge, Larus argentatus | H5N1 HPAI, H5 HPAI | 12 |
| Week 29 (2023) | Argyll and Bute | Argyll and Bute | Razorbill (2), Puffin (1) | Alca torda, Fratercula arctica | H5N1 HPAI | 3 |
| Week 29 (2023) | Boston | Lincolnshire | Mallard duck (1) | Anas platyrhynchos | H5 HPAI | 1 |
| Week 29 (2023) | Braintree | Essex | Carrion Crow (1) | Corvus corone | H5 HPAI | 1 |
| Week 29 (2023) | Carmarthenshire | Carmarthenshire | Guillemot (4) | Uria aalge | H5N1 HPAI | 4 |
| Week 29 (2023) | Cumberland | Cumbria | Kittiwake (2), Guillemot (10), Fulmar (1) | Rissa tridactyla, Uria aalge, Fulmarus glacialis | H5N1 HPAI, H5 HPAI | 13 |
| Week 29 (2023) | Dumfries and Galloway | Dumfries and Galloway | Guillemot (4) | Uria aalge | H5N1 HPAI | 4 |
| Week 29 (2023) | Dundee City | Dundee | Guillemot (3) | Uria aalge | H5N1 HPAI | 3 |
| Week 29 (2023) | East Lothian | East Lothian | Guillemot (1), Kittiwake (1) | Uria aalge, Rissa tridactyla | H5N1 HPAI | 2 |
| Week 29 (2023) | Fife | Fife | Common Gull (2), Kittiwake (1), Guillemot (1), Unspecified Gull (1) | Larus canus, Uria aalge, Rissa tridactyla | H5N1 HPAI | 5 |
| Week 29 (2023) | Hampshire | Hampshire | Black Headed Gull (2) | Chroicocephalus ridibundus | H5N1 HPAI | 2 |
| Week 29 (2023) | Highlands | Highlands | Guillemot (2), Herring Gull (7), Unspecified Tern (1), Kittiwake (5) | Uria aalge, Larus argentatus, Rissa tridactyla | H5N1 HPAI | 15 |
| Week 29 (2023) | Moray | Moray | Kittiwake (3), Carrion Crow (1), Herring Gull (1) | Rissa tridactyla, Corvus corone, Larus argentatus | H5N1 HPAI | 5 |
| Week 29 (2023) | Newcastle City Council | Tyne and Wear | Kittiwake (1) | Rissa tridactyla | H5 HPAI | 1 |
| Week 29 (2023) | North Tyneside | Tyne and Wear | Herring Gull (1), Common Tern (3), Black Headed Gull (1) | Larus argentatus, Sterna hirundo, Chroicocephalus ridibundus | H5N1 HPAI, H5 HPAI | 5 |
| Week 29 (2023) | North Yorkshire | North Yorkshire | Black Headed Gull (1) | Chroicocephalus ridibundus | H5N1 HPAI | 1 |
| Week 29 (2023) | Northumberland | Northumberland | Artic Tern (3), Black Headed Gull (3), Guillemot (1), Herring Gull (2), Kittiwake (3) | Sterna paradisaea, Chroicocephalus ridibundus, Uria aalge, Larus argentatus, Rissa tridactyla | H5N1 HPAI, H5 HPAI | 12 |
| Week 29 (2023) | Pembrokeshire | Pembrokeshire | Guillemot (5), Great Black Backed Gull (1) | Uria aalge, Larus marinus | H5N1 HPAI, H5 HPAI | 6 |
| Week 29 (2023) | Sefton Metropolitan | Merseyside | Kittiwake (2) | Rissa tridactyla | H5N1 HPAI, H5 HPAI | 2 |
| Week 29 (2023) | Shetland Islands | Shetland Islands | Arctic Tern (2) | Sterna paradisaea | H5N1 HPAI, H5 HPAI | 2 |
| Week 29 (2023) | South Tyneside | Tyne and Wear | Kittiwake (3) | Rissa tridactyla | H5N1 HPAI | 3 |
| Week 29 (2023) | Sunderland City Council | Tyne and Wear | Herring Gull (1) | Larus argentatus | H5N1 HPAI | 1 |
| Week 29 (2023) | Swansea | Swansea | Guillemot (7) | Uria aalge | H5N1 HPAI, H5 HPAI | 7 |
| Week 29 (2023) | Torridge | Devon | Feral Pigeon or Rock Dover (1) | Columba livia | H5N1 HPAI | 1 |
| Week 29 (2023) | West Lothian | Lothian | Artic Tern (1) | Sterna paradisaea | H5Nx HPAI | 1 |
| Week 29 (2023) | West Suffolk | Suffolk | Moorhen (1), Coot (2) | Gallinula chloropus, Fulica atra | H5Nx HPAI | 3 |
| Week 29 (2023) | Westmorland and Furness | Cumbria | Guillemot (3), Razorbill (1) | Uria aalge, Alca torda | H5N1 HPAI | 4 |
| Week 30 (2023) | Aberdeenshire | Aberdeenshire | Curlew (1), Shag (1), Cormorant (2), Razorbill (1) | Numenius arquata, Gulosus aristotelis, Phalacrocorax carbo, Alca torda | H5N1 HPAI | 5 |
| Week 30 (2023) | Angus | Angus | Razorbill (1) | Alca torda | H5N1 HPAI | 1 |
| Week 30 (2023) | Cheshire East | Cheshire | Mute Swan (1) | Cygnus olor | H5 HPAI | 1 |
| Week 30 (2023) | Conwy | Conwy | Herring Gull (1) | Larus argentatus | H5N1 HPAI | 1 |
| Week 30 (2023) | Cumberland | Cumbria | Guillemot (1) | Uria aalge | H5N1 HPAI | 1 |
| Week 30 (2023) | Gateshead Metropolitan | Tyne and Wear | Kittiwake (2) | Rissa tridactyla | H5N1 HPAI | 2 |
| Week 30 (2023) | Gwynedd | Gwynedd | Lesser Black-Backed Gull (1), Herring Gull (3) | Larus fuscus, Larus argentatus | H5N1 HPAI, H5 HPAI | 4 |
| Week 30 (2023) | Hertfordshire | Hertfordshire | Mallard Duck (1) | Anas platyrhynchos | H5 HPAI | 1 |
| Week 30 (2023) | Isle of Anglesey | Isle of Anglesey | Guillemot (3) | Uria aalge | H5N1 HPAI, H5 HPAI | 3 |
| Week 30 (2023) | Lancaster | Lancashire | Lesser Black-Backed Gull (1) | Larus fuscus | H5N1 HPAI | 1 |
| Week 30 (2023) | North Tyneside | Tyne and Wear | Herring Gull (1), Kittiwake (1), Common Tern (3) | Larus argentatus, Rissa tridactyla, Sterna Hirundo | H5N1 HPAI | 5 |
| Week 30 (2023) | North Yorkshire | North Yorkshire | Herring Gull (3) | Larus argentatus | H5N1 HPAI, H5 HPAI | 3 |
| Week 30 (2023) | Northumberland | Northumberland | Common Tern (1), Herring Gull (1), Kittiwake (1), Little Tern (1), Arctic Tern (3) | Sterna Hirundo, Larus argentatus, Rissa tridactyla, Sternula albifrons, Sterna paradisaea | H5N1 HPAI | 7 |
| Week 30 (2023) | Pembrokeshire | Pembrokeshire | Great Black Backed Gull (1), Gannet (1), Guillemot (1) | Larus marinus, Morus bassanus, Uria aalge | H5N1 HPAI, H5 HPAI | 3 |
| Week 30 (2023) | Scottish Borders | Scottish Borders | Red Grouse (1) | Lagopus lagopus | H5N1 HPAI | 1 |
| Week 30 (2023) | Sunderland | Tyne and Wear | Peregrine (1) | Falco peregrinus | H5 HPAI | 1 |
| Week 30 (2023) | Swansea | Swansea | Guillemot (3) | Uria aalge | H5N1 HPAI, H5 HPAI | 3 |
| Week 30 (2023) | The Highlands | Highland | Kittiwake (3), Herring Gull (2), Guillemot (1), Unspecified Tern (1) | Rissa tridactyla, Larus argentatus,Uria aalge | H5N1 HPAI, H5 HPAI | 7 |
| Week 31 (2023) | Pembrokeshire | Pembrokeshire | Kittiwake (1) | Rissa tridactyla | H5N1 HPAI | 1 |
| Week 31 (2023) | Hartlepool | Durham | Herring Gull (2) | Larus argentatus | H5N1 HPAI | 2 |
| Week 31 (2023) | Northumberland | Northumberland | Common Tern (3), Kittiwake (3), Unspecified Gull (1) | Sterna hirundo, Rissa tridactyla | H5N1 HPAI | 7 |
| Week 31 (2023) | City and County of Swansea | Swansea | Guillemot (3), Common Gull (2) | Uria aalge, Larus canus | H5N1 HPAI | 5 |
| Week 31 (2023) | Scottish Borders | Scottish Borders | Kittiwake (3), Guillemot (2) | Rissa tridactyla, Uria aalge | H5N1 HPAI | 5 |
| Week 31 (2023) | South Ayrshire | South Ayrshire | Guillemot (1) | Uria aalge | H5N1 HPAI | 1 |
| Week 31 (2023) | Aberdeenshire | Aberdeenshire | Razorbill (1) | Alca torda | H5N1 HPAI | 1 |
| Week 31 (2023) | Trafford Metropolitan Borough | Greater Manchester | Mallard Duck (1) | Anas platyrhynchos | H5N1 HPAI | 1 |
| Week 31 (2023) | North Yorkshire | North Yorkshire | Kittiwake (1) | Rissa tridactyla | H5N1 HPAI | 1 |
| Week 31 (2023) | Broadland | Norfolk | Peregrine (3) | Falco peregrinus | H5N1 HPAI | 3 |
| Week 31 (2023) | West Suffolk | Suffolk | Mute Swan (1) | Cygnus olor | H5 HPAI | 1 |
| Week 31 (2023) | Redcar and Cleveland | North Yorkshire | Kittiwake (1), Razorbill (1) | Rissa tridactyla, Alca torda | H5N1 HPAI, H5 HPAI | 2 |
| Week 31 (2023) | Isle of Anglesey | Anglesey | Guillemot (1) | Uria aalge | H5N1 HPAI | 1 |
| Week 31 (2023) | Gwynedd | Gwynedd | Guillemot (3) | Uria aalge | H5N1 HPAI | 3 |
| Week 31 (2023) | Conwy | Conwy | Gannet (1) | Morus bassanus | H5N1 HPAI | 1 |
| Week 31 (2023) | Ceredigion | Ceredigion | Guillemot (1) | Uria aalge | H5N1 HPAI | 1 |
| Week 31 (2023) | Northumberland | Northumberland | Roseate Tern (3) | Sterna dougallii | H5N1 HPAI | 3 |
| Week 31 (2023) | Highlands | Highlands | Herring Gull (2) | Larus argentatus | H5N1 HPAI | 2 |
| Week 31 (2023) | Highlands | Highlands | Great black backed Gull (1) | Larus marinus | H5N1 HPAI | 1 |
| Week 32 (2023) | Aberdeen City | Aberdeenshire | Kittiwake (2) | Rissa tridactyla | H5N1 HPAI | 2 |
| Week 32 (2023) | Arun | West Sussex | Mallard Duck (1) | Anas platyrhynchos | H5N1 HPAI | 1 |
| Week 32 (2023) | East Lothian | East Lothian | Razorbill (1) | Alca torda | H5N1 HPAI | 1 |
| Week 32 (2023) | Fife | Fife | Common Gull (1), Guillemot (4), Herring Gull (2), Kittiwake (1), Puffin (1) | Larus canus, Uria aalge, Larus argentatus, Rissa tridactyla, Fratercula arctica | H5N1 HPAI, H5 HPAI | 9 |
| Week 32 (2023) | New Forrest | Hampshire | Peregrine (1) | Falco peregrinus | H5N1 HPAI | 1 |
| Week 32 (2023) | Pembrokeshire | Pembrokeshire | Unspecified Bird (1) | Not set | H5N1 HPAI | 1 |
| Week 32 (2023) | Stockton-on-Tees | Durham | Kittiwake (2) | Rissa tridactyla | H5N1 HPAI | 2 |
| Week 32 (2023) | The Highland Council | Highlands | Herring gull (1) | Larus argentatus | H5N1 HPAI | 1 |
| Week 32 (2023) | West Lothian | Lothian | Sparrowhawk (1) | Accipiter nisus | H5 HPAI | 1 |
| Week 33 (2023) | Canterbury | Kent | Herring Gull (1) | Larus argentatus, Alca torda | H5N1 HPAI | 1 |
| Week 33 (2023) | East Lothian | East Lothian | Herring Gull (1), Razorbill (1) | Larus argentatus, Alca torda | H5N1 HPAI | 2 |
| Week 33 (2023) | Fife | Fife | Cormorant (1) | Phalacrocorax carbo | H5N1 HPAI | 1 |
| Week 33 (2023) | Redcar and Cleveland | Redcar and Cleveland | Herring Gull (3) | Larus argentatus | H5N1 HPAI | 3 |
| Week 33 (2023) | The Highland Council | Highlands | Herring Gull (1) | Larus argentatus | H5N1 HPAI | 1 |
| Week 33 (2023) | Western Isles | Western Isles | Common Gull (2) | Larus canus | H5N1 HPAI | 2 |
| Week 33 (2023) | Westmorland and Furness | Cumbria | Guillemot (1) | Uria aalge | H5N1 HPAI | 1 |
| Week 34 (2023) | Northumberland | Northumberland | Guillemot (1) | Uria aalge | H5N1 HPAI | 1 |
| Week 34 (2023) | East Riding of Yorkshire | East Riding of Yorkshire | Black Headed Gull (1) | Chroicocephalus ridibundus | H5N1 HPAI | 1 |
| Week 34 (2023) | Lancashire | Lancashire | Sparrowhawk (1) | Accipiter nisus | H5N1 HPAI | 1 |
| Week 34 (2023) | Durham | Durham | Kittiwake (3) | Rissa tridactyla | H5N1 HPAI | 3 |
| Week 34 (2023) | North Yorkshire | North Yorkshire | Guillemot (1) | Uria aalge | H5N1 HPAI | 1 |
| Week 34 (2023) | Stratford-on-Avon | Warwickshire | Herring Gull (1) | Larus argentatus | H5N1 HPAI | 1 |
| Week 34 (2023) | West Berkshire | West Berkshire | Greylag Goose (1) | Anser anser | H5 HPAI | 1 |
| Week 34 (2023) | Northumberland | Northumberland | Arctic Tern (4), Black Headed Gull (1), Herring Gull (2) | Sterna paradisaea, Chroicocephalus ridibundus, Larus argentatus | H5N1 HPAI | 7 |
| Week 34 (2023) | North Lanarkshire | North Lanarkshire | Peregrine Falcon (2) | Falco peregrinus | H5N1 HPAI | 2 |
| Week 35 (2023) | Moray | Moray | Common Pheasant (4) | Phasianus colchicus | H5N1 HPAI | 4 |
| Week 36 (2023) | Fife | Fife | Herring Gull (1) | Larus argentatus | H5 HPAI | 1 |
| Week 36 (2023) | Highland | Highland | Common Tern (2) | Sterna Hirundo | H5N1 HPAI | 2 |
| Week 36 (2023) | Lothian | Lothian | Unknown Buzzard(1) | Not set | H5N1 HPAI | 1 |
| Week 36 (2023) | Somerset | Somerset | Peregrine (1) | Falco peregrinus | H5N1 HPAI | 1 |
| Week 37 (2023) | Angus | Angus | Kittiwake (1) | Rissa tridactyla | H5N1 HPAI | 1 |
| Week 38 (2023) | Pembrokeshire | Pembrokeshire | Unspecified Gull (1) | Not set | H5N1 HPAI | 1 |
| Week 39 (2023) | Hartlepool | Durham | Herring Gull (1) | Larus argentatus | H5N5 HPAI | 1 |
| Week 40 (2023) | Shetland | Shetland | Great Black Backed Gull (1) | Larus marinus | H5N5 HPAI | 1 |
| Week 40 (2023) | Stafford | Staffordshire | Pheasant (5) | Phasianus colchicus | H5N1 HPAI | 5 |
| Week 41 (2023) | Aberdeenshire | Aberdeenshire | Pheasant (1) | Phasianus colchicus | H5N1 HPAI | 1 |
| Week 41 (2023) | Milford Haven | Pembrokeshire | Lesser black-backed gull (1) | Larus fuscus | H5N1 HPAI | 1 |
| Week 41 (2023) | Shetland | Shetland | Gannet (1), Great black-backed gull (1) | Morus bassanus, Larus marinus | H5 HPAI, H5N5 HPAI | 2 |
| Week 41 (2023) | Wirral | Merseyside | Herring Gull (1) | Larus argentatus | H5 HPAI | 1 |
| Week 42 (2023) | Borough of Blackpool | Lancashire | Herring Gull (1) | Larus argentatus | H5N1 HPAI | 1 |
| Week 44 (2023) | East Lothian | Lothian | Sparrow Hawk (1) | Accipiter nisus | H5N1 HPAI | 1 |
| Week 44 (2023) | Shetland Islands | Shetland Islands | Herring Gull (1) | Larus argentatus | H5N1 HPAI | 1 |
| Week 44 (2023) | Hull | East Riding and North Lincolnshire | Common Gull (1) | Larus canus | H5N5 HPAI | 1 |
| Week 45 (2023) | East Lindsey | Lincolnshire | Common Buzzard (1) | Buteo buteo | H5N5 HPAI | 1 |
| Week 45 (2023) | Highland | Highland | Shag (1) | Gulosus aristotelis | H5N1 HPAI | 1 |
| Week 45 (2023) | Stroud | Gloucestershire | Greylag Goose (2) | Anser anser | H5N1 HPAI | 2 |
| Week 48 (2023) | South Gloucestershire | Gloucestershire | Merlin (1) | Falco columbarius | H5N1 HPAI | 1 |
| Week 48 (2023) | King's Lynn and West Norfolk | Norfolk | Mute Swan (1) | Cygnus olor | H5 HPAI | 1 |
| Week 49 (2023) | Newton Stewart | Dumfries and Galloway | Herring Gull (1) | Larus argentatus | H5N1 HPAI | 1 |
| Week 51 (2023) | King's Lynn and West Norfolk | Norfolk | Greylag Goose (1) | Anser anser | H5N1 HPAI | 1 |
| Week 52 (2023) | King's Lynn and West Norfolk | Norfolk | Whooper Swan (1) | Cygnus cygnus | H5N1 HPAI | 1 |