Research and analysis

Avian influenza in wild birds: 2021

Updated 19 July 2024
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Week number Location Number of findings Species involved Total number of birds testing positive
Week 1 (2021) Lancashire 1 Pink footed goose 1
Week 1 (2021) County Durham 1 Canada goose 1
Week 1 (2021) Western Isles 1 Mute swan 1
Week 1 (2021) Warwickshire 1 Mute Swan 1
Week 2 (2021) Devon 1 Mute swan 3
Week 2 (2021) Yorkshire 1 Common Buzzard 1
Week 3 (2021) Moray 1 Knot 1
Week 3 (2021) Aberdeenshire 1 Red Knot 2
Week 3 (2021) Lincolnshire 1 Red Kite 1
Week 4 (2021) Devon 1 Mute swan 3
Week 4 (2021) Cornwall 1 Mute swan 2
Week 4 (2021) East Lothian 1 Mute swan 2
Week 5 (2021) Cambridgeshire 1 Buzzard 1
Week 5 (2021) Lancashire 1 Peregrine Falcon 1
Week 6 (2021) Not applicable 0 No positive birds reported 0
Week 7 (2021) Not applicable 0 No positive birds reported 0
Week 8 (2021) Not applicable 0 No positive birds reported 0
Week 9 (2021) Not applicable 0 No positive birds reported 0
Week 10 (2021) West Yorkshire 1 Red Kite 1
Week 11 (2021) Not applicable 0 No positive birds reported 0
Week 12 (2021) Not applicable 0 No positive birds reported 0
Week 13 (2021) Not applicable 0 No positive birds reported 0
Week 14 (2021) Not applicable 0 No positive birds reported 0
Week 15 (2021) Staffordshire 1 Pheasant 6
Week 15 (2021) Fife, Scotland 1 Rook 3
Week 16 (2021) Not applicable 0 No positive birds reported 0
Week 17 (2021) Not applicable 0 No positive birds reported 0
Week 18 (2021) Not applicable 0 No positive birds reported 0
Week 19 (2021) Not applicable 0 No positive birds reported 0
Week 20 (2021) Not applicable 0 No positive birds reported 0
Week 21 (2021) Not applicable 0 No positive birds reported 0
Week 22 (2021) Not applicable 0 No positive birds reported 0
Week 23 (2021) Not applicable 0 No positive birds reported 0
Week 24 (2021) Not applicable 0 No positive birds reported 0
Week 25 (2021) Not applicable 0 No positive birds reported 0
Week 26 (2021) Not applicable 0 No positive birds reported 0
Week 27 (2021) Not applicable 0 No positive birds reported 0
Week 28 (2021) Not applicable 0 No positive birds reported 0
Week 29 (2021) Not applicable 0 No positive birds reported 0
Week 30 (2021) Shetland, Scotland 1 Great Skua 3
Week 31 (2021) Not applicable 0 No positive birds reported 0
Week 32 (2021) Flannan Isles, Outer Hebrides, Scotland 1 Great Skua 1
Week 33 (2021) St Kilda, Outer Hebrides, Scotland 1 Great Skua 3
Week 34 (2021) Not applicable 0 No positive birds reported 0
Week 35 (2021) Not applicable 0 No positive birds reported 0
Week 36 (2021) Not applicable 0 No positive birds reported 0
Week 37 (2021) Not applicable 0 No positive birds reported 0
Week 38 (2021) Not applicable 0 No positive birds reported 0
Week 39 (2021) Not applicable 0 No positive birds reported 0
Week 40 (2021) Not applicable 0 No positive birds reported 0
Week 41 (2021) Not applicable 0 No positive birds reported 0
Week 42 (2021) Not applicable 0 No positive birds reported 0
Week 43 (Wrexham, Wales) 1 Pheasant 5
Week 43 (Preston, Lancashire) 1 Curlew 1
Week 43 (Kirkaldy, Fife, Scotland) 1 Unspecified gull 1
Week 43 (Edinburgh, Scotland) 1 Mute swan 1
Week 43 (Lancashire 1 Whooper swan 1
Week 43 (Lancashire) 1 Greylag goose 1
Week 44 (2021) (Worcestershire) 2 Mute swan 4
Week 44 (2021) (Lancashire) 2 Whooper swan 2
Week 44 (2021) (Lancashire) 1 Pink-footed goose 1
Week 44 (2021) (Warwickshire) 1 Canada goose 1
Week 44 (2021) (Warwickshire) 2 Mute swan 4
Week 44 (2021) (Norfolk) 1 Mute swan 1
Week 44 (2021) (North Yorkshire) 1 Mute swan 1
Week 44 (2021) (Lancashire) 1 Greylag goose 2
Week 44 (2021) (Carmarthenshire, Wales) 1 Herring gull 1
Week 45 (2021) Lancashire 1 Whooper Swan, Greylag goose 3
Week 45 (2021) Stratford-on-Avon District Council 3 Mute swans; unspecified geese, common buzzard 33
Week 45 (2021) Richmondshire 1 Common buzzard, wild pheasant 6
Week 45 (2021) Bury 1 Great crested grebe 1
Week 45 (2021) Ceredigion 1 Canada geese 2
Week 45 (2021) City of Carlisle 1 Barnacle goose 1
Week 45 (2021) East Riding of Yorkshire 1 Peregrine falcon 2
Week 45 (2021) Pewsey, Wilts 1 Mute swan 1
Week 45 (2021) Tewkesbury Borough 1 Mute swan 1
Week 45 (2021) Wokingham Borough  1 Mute swan 1
Week 45 (2021) Malvern Hills District Council 1 Mute swan 3
Week 45 (2021) West Lancashire Borough 2 Greylag goose, whooper swan, pink footed goose, mallard duck 1
Week 45 (2021) Borough Council of Kings Lynn and West Norfolk 1 Whooper swan 7
Week 46 (2021) Fylde Borough Council 1 Mute Swan 2
Week 46 (2021) Arun District Council 1 Mute Swan 1
Week 46 (2021) Lichfield 1 Mute Swan 2
Week 46 (2021) Dumfries and Galloway 1 Whooper swan 1
Week 46 (2021) Fife 1 Common buzzard 1
Week 46 (2021) Powys 1 Mute Swan 1
Week 46 (2021) Sefton Metropolitan Borough Council 1 Pink-footed goose 3
Week 46 (2021) Lancaster City Council 1 Mute Swan 1
Week 46 (2021) Lancaster City Council 1 Mallard duck 1
Week 46 (2021) South Lakeland District Council 1 Mute Swan 2
Week 46 (2021) Dumfries and Galloway 1 Barnacle goose 1
Week 46 (2021) Fylde Borough Council 1 Mute Swan 1
Week 46 (2021) Bury Metropolitan Borough Council 1 Canada goose 1
Week 46 (2021) West Lancashire Borough Council 1 Canada goose, curlew 2
Week 46 (2021) Stockport Metropolitan Borough Council 1 Canada goose 2
Week 46 (2021) Fylde Borough Council 1 Mute swans 2
Week 46 (2021) Blackpool Borough Council 1 Mute swans 2
Week 46 (2021) Rushcliffe Borough Council 1 Mute swan 1
Week 46 (2021) Borough Council of Kings Lynn and West Norfolk 1 Pink footed goose 1
Week 46 (2021) Craven District Council 1 Canada goose 1
Week 46 (2021) Northumberland 1 Barnacle goose, mute swan 2
Week 46 (2021) Northumberland 1 Greylag goose 1
Week 46 (2021) Stockton-on-Tees Borough Council 1 Barnacle goose 1
Week 46 (2021) Bury Metropolitan Borough Council 1 Mute swan 1
Week 46 (2021) Lichfield District Council 1 Mute swan 2
Week 46 (2021) Stroud District Council 1 Mute swan 1
Week 46 (2021) Dumfries and Galloway 1 Whooper swan 1
Week 46 (2021) Perth and Kinross Council 1 Unspecified duck 1
Week 46 (2021) Walsall Metropolitan Borough Council 1 Mute swans 2
Week 47 (2021) Sefton Metropolitan Borough Council 1 Pink footed goose; Canada goose 3
Week 47 (2021) West Lancashire Borough 1 Whooper swan 1
Week 47 (2021) Bury Metropolitan Borough Council 1 Canada goose 2
Week 47 (2021) Dumfriesshire 1 Barnacle goose, kestrel, Whooper swan 3
Week 47 (2021) Rushcliffe Borough Council 1 swan 1
Week 47 (2021) Stroud District Council 1 mute swans 2
Week 47 (2021) South Ribble Borough Council 1 widgeon 1
Week 47 (2021) Wyre Council 1 Mute swan 1
Week 47 (2021) Fylde Borough Council 1 Mute swan 1
Week 47 (2021) Melton Borough Council 1 Swan 1
Week 47 (2021) Charnwood Borough Council 1 Swan 1
Week 47 (2021) East Suffolk District Council 1 Swans 2
Week 47 (2021) Sedgefield 1 Swan, Canada goose 2
Week 47 (2021) Dumfriesshire 1 Pink Footed Goose 1
Week 47 (2021) Dumfriesshire 1 Greylag goose 1
Week 47 (2021) Dumfriesshire 1 Barnacle Goose 1
Week 47 (2021) Fife 1 Mute swan 2
Week 47 (2021) Angus 1 Greylag goose 2
Week 47 (2021) Highland 1 Sea eagle 1
Week 47 (2021) Dorset 1 Mute swans 4
Week 47 (2021) Walsall Metropolitan Borough Council 1 Mute swans 2
Week 47 (2021) Lichfield District Council 1 Mute swan, black headed gull 2
Week 47 (2021) Lancaster City Council 1 Mute swan 1
Week 47 (2021) South Lakeland District Council 1 Mute swan 4
Week 47 (2021) Rother District Council 1 Greylag goose 1
Week 47 (2021) North Northamptonshire 1 Mute swan 2
Week 47 (2021) West Northamptonshire 1 Mute swan 1
Week 47 (2021) Sandwell Metropolitan Borough Council 1 Canada goose 1
Week 47 (2021) Walsall Metropolitan Borough Council 1 Mute swan 1
Week 47 (2021) Aberdeenshire 1 Unspecified goose 1
Week 47 (2021) Craven District Council 1 Mute swan 1
Week 47 (2021) Cheshire East 1 Mute swan, Canada geese 7
Week 47 (2021) Herefordshire 1 Mute swan 1
Week 47 (2021) Blackpool Borough Council 1 Mute swans 2
Week 48 (2021) Dumfries and Galloway 1 Unspecified goose 2
Week 48 (2021) Dumfriesshire 1 Barnacle goose 2
Week 48 (2021) Peterborough City Council 1 Greylag goose 1
Week 48 (2021) South Cambridgeshire District Council 1 Mute swan 1
Week 48 (2021) West Lancashire Borough 1 Mute swan 1
Week 48 (2021) Leeds City Council 1 Common buzzard 1
Week 48 (2021) Wokingham 1 Mute swan 1
Week 48 (2021) Stratford-on-Avon District Council 1 Canada goose, mute swan 7
Week 48 (2021) City of Carlisle 1 Barnacle goose 1
Week 48 (2021) Dumfriesshire 1 Whooper swan; unidentified swan 2
Week 48 (2021) South Lanarkshire 1 Unspecified goose 1
Week 48 (2021) Falkirk 1 Swan 1
Week 48 (2021) Dumfriesshire 1 Barnacle goose 1
Week 48 (2021) Dumfries and Galloway 1 Barnacle goose 1
Week 48 (2021) Dumfriesshire 1 Barnacle goose 1
Week 48 (2021) Stroud 1 Mute swans 5
Week 48 (2021) Scottish Borders 1 Mute swan 1
Week 48 (2021) Fylde Borough Council 1 Mute swan 1
Week 48 (2021) Sefton Metropolitan Borough Council 1 Mute swan 3
Week 48 (2021) Fylde Borough Council 1 Mute swan 3
Week 48 (2021) Carlisle City Council 2 Barnacle goose 2
Week 48 (2021) Allerdale Borough Council 1 Barnacle goose 1
Week 48 (2021) South Norfolk District Council 1 Mute swan 1
Week 48 (2021) North Norfolk District Council 1 Mute swan 1
Week 48 (2021) North Norfolk District Council 1 Mute swan 2
Week 48 (2021) Chelmsford City Council 1 Mute swan, greylag goose 2
Week 48 (2021) West Northamptonshire 1 Mute swan 1
Week 48 (2021) Sunderland City Council 1 Mute swan 6
Week 48 (2021) Stockton-on-Tees Borough Council 1 Mute swan; swan 3
Week 48 (2021) Hartlepool Borough Council 1 Goose 1
Week 48 (2021) Harrogate 1 Canada goose; greylag goose 2
Week 48 (2021) Cheddar 1 Common buzzard 1
Week 48 (2021) Dorset 1 Mute swan 1
Week 48 (2021) Dorset 1 Canada goose 1
Week 48 (2021) Anglesey 1 Mute swan 1
Week 48 (2021) Shropshire 1 Canada goose 2
Week 48 (2021) Bury 1 Canada goose 1
Week 48 (2021) Gwynedd Council 1 Common buzzard 1
Week 48 (2021) Dumfries and Galloway 1 Canada goose 1
Week 48 (2021) Stroud 1 Mute swan, greylag goose 4
Week 49 (2021) Allerdale Borough Council 2 Mute Swan,Barnacle Goose 3
Week 49 (2021) Dumfries and Galloway 5 Common Buzzard, Greylag goose, Mute Swan, Barnacle Goose 5
Week 49 (2021) West Berkshire Council 1 Mute Swan 3
Week 49 (2021) Wokingham 1 Mute Swan 1
Week 49 (2021) Lewes 1 Greylag goose 1
Week 49 (2021) Chelmsford 1 Unidentified Swan 1
Week 49 (2021) South Oxfordshire 1 Kestrel 1
Week 49 (2021) Gedling Borough 1 Mute Swan 1
Week 49 (2021) Durham 3 Unspecified Goose,Greylag goose,Unidentified Swan. 3
Week 49 (2021) Teignbridge 1 Black Swan 1
Week 49 (2021) Walsall Metropolitan Borough Council 1 Unspecified Goose 2
Week 49 (2021) Eden 1 Mute Swan 1
Week 49 (2021) Cheshire East 1 Common Buzzard 1
Week 49 (2021) Shropshire 1 Unspecified Goose 1
Week 49 (2021) Halton Borough 1 Mute Swan 1
Week 49 (2021) Sunderland City Council 2 Black headed gull 2
Week 49 (2021) Angus 1 Unidentified Swan 1
Week 49 (2021) West Lancashire Borough 2 Whooper Swan, Greylag goose 3
Week 49 (2021) Scottish Borders 1 Mute Swan 1
Week 49 (2021) North Northamptonshire 1 Mute Swan 1
Week 49 (2021) East Riding of Yorkshire 1 Greylag goose 1
Week 49 (2021) Leeds City Council 1 Greylag goose 1
Week 49 (2021) Dorset 1 Mute Swan 1
Week 49 (2021) Stroud 3 Mute Swan, Greylag goose 4
Week 49 (2021) West Lancashire Borough 3 Whooper Swan, Lapwing 3
Week 50 (2021) Allerdale Borough Council 2 Barnacle Goose 2
Week 50 (2021) South Lakeland District Council 1 Pheasant 2
Week 50 (2021) Harrogate 2 Mute Swan 2
Week 50 (2021) Ryedale District Council 1 Sparrowhawk 1
Week 50 (2021) Dorset 3 Canada Goose, Mute Swan, Black Swan 4
Week 50 (2021) City of Wolverhampton Council 2 Mute Swan, Canada Goose 4
Week 50 (2021) Dumfries and Galloway 8 Common Buzzard, Barnacle Goose, Canada Goose, Mute Swan 8
Week 50 (2021) West Lancashire Borough 2 Grey Heron, Whooper Swan 2
Week 50 (2021) South Lanarkshire 1 Mute Swan 1
Week 50 (2021) Stroud 2 Bewick's Swan, Greylag Goose 2
Week 50 (2021) Leeds City Council 1 Mute Swan 1
Week 50 (2021) Shropshire 1 Mute Swan 2
Week 50 (2021) Wigan Metropolitan Borough 1 Canada Goose 2
Week 50 (2021) Scottish Borders 1 Common Buzzard 1
Week 50 (2021) Mendip District Council 1 Common Buzzard 1
Week 50 (2021) Borough Council of Kings Lynn and West Norfolk 1 Whooper Swan 2
Week 50 (2021) Dumfriesshire 4 Barnacle Goose, Whooper Swan 4
Week 50 (2021) Highland 1 Common Buzzard 1
Week 51 (2021) Sunderland City Council 3 Mute Swan, Canada Goose, Kestrel 3
Week 51 (2021) East Riding of Yorkshire 1 Peregrine Falcon 1
Week 51 (2021) Dorset 3 Mute Swan, Canada Goose Greylag Goose 17
Week 51 (2021) West Lancashire Borough 1 Black headed gull 1
Week 51 (2021) Dumfries and Galloway 1 Common Buzzard 1
Week 51 (2021) Aberdeenshire 1 Unidentified Swan 1
Week 51 (2021) Newcastle City Council 1 Unspecified Duck 1
Week 51 (2021) County Durham 1 Common Buzzard 1
Week 51 (2021) Breckland 1 Common Buzzard 1
Week 51 (2021) North Norfolk District Council 1 Mute Swan 1
Week 51 (2021) Carlisle City Council 1 Common Buzzard 1
Week 51 (2021) Dumfries and Galloway 2 Barnacle Goose 3
Week 51 (2021) Walsall Metropolitan Borough Council 2 Canada Goose 3
Week 51 (2021) Sandwell Metropolitan Borough Council 1 Canada Goose 3
Week 51 (2021) Cheshire East 1 Canada Goose 2
Week 51 (2021) Borough Council of Kings Lynn and West Norfolk 1 Whooper Swan 1
Week 52 (2021) Melton Borough Council 1 Sparrowhawk 1
Week 52 (2021) South Tyneside 2 Mute Swan 3
Week 52 (2021) South Lanarkshire 1 Mute Swan 1
Week 52 (2021) Dumfriesshire 5 Barnacle Goose, Whooper Swan, Gull, Common Buzzard, Mute Swan 9
Week 52 (2021) Dumfries and Galloway 2 Unidentified Swan, Barnacke Goose 2
Week 52 (2021) South Lanarkshire 1 Sparrowhawk 1
Week 52 (2021) North Somerset 1 Mute Swan 1
Week 52 (2021) Aberdeenshire 2 Unidentified Swan, Unidentified Duck 2
Week 52 (2021) Warrington 1 Mute Swan 1
Week 52 (2021) St Helens 2 Great-crested Grebe, Canada Goose 3
Week 52 (2021) City of Wolverhampton Council 1 Canada Goose 2
Week 52 (2021) Glasgow City 1 Unidentified Swan 1
Week 52 (2021) Stockport Metropolitan Borough Council 1 Black headed Gull 1
Week 52 (2021) Scottish Borders 2 Common Buzzard, Greylag Goose 2
Week 52 (2021) Stroud 1 Greylag Goose 1
Week 52 (2021) Midlothian 1 Mute Swan 1