| Administrative Area/County | Sites | Year(s)a | Countb | Corrected No. Birdsc | |
| Ireland | Clare | 14 | 1999-2002 | 24,962 | 41,687 |
| Cork | 8 | 1999-2001 | 3,763 | 6,284 | |
| Donegal | 17 | 1999 | 7,656 | 12,786 | |
| Dublin | 13 | 1999 | 63,837 | 106,608 | |
| Galway | 6 | 1999 | 3,444 | 5,751 | |
| Kerry | 15 | 1999-2002 | 7,406 | 12,368 | |
| Mayo | 19 | 1999-2000 | 3,830 | 6,396 | |
| Waterford | 5 | 1999 | 1,055 | 1,762 | |
| Wexford | 1 | 2000 | 21,436 | 35,798 | |
| Wicklow | 4 | 1999 | 992 | 1,657 | |
| Antrim | 44 | 1999-2002 | 98,546 | 164,572 | |
| Subtotal | 146 | 395,669 | |||
| England | Cornwall | 29 | 1999-2000 | 1,424 | 2,378 |
| Cumbria | 2 | 1999 | 6,450 | 10,772 | |
| Devon | 13 | 1999-2001 | 3,926 | 6,556 | |
| Dorset | 7 | 1999-2000 | 954 | 1,593 | |
| Humberside | 27 | 2000 | 46,625 | 77,864 | |
| North Yorkshire | 4 | 2000-2002 | 530 | 885 | |
| Northumberland (Farne Islands) | 12 | 2000 | 31,542 | 52,675 | |
| Subtotal | 94 | 152,723 | |||
| Channel Islands | 4 | 2000 | 476 | 795 | |
| Isle of Man | 6 | 1999 | 4,566 | 7,625 | |
| Isle of Wight | 1 | 2001 | 337 | 563 | |
| Isles of Scilly | 4 | 1999 | 196 | 327 | |
| Subtotal | 11 | 8,515 | |||
| Scotland | Angus | 4 | 2000 | 1,002 | 1,673 |
| Argyll and Bute | 53 | 1999-2000 | 43,692 | 72,966 | |
| Banff and Buchan | 46 | 2001 | 73,970 | 123,530 | |
| Berwickshire | 19 | 1998-2000 | 44,636 | 74,542 | |
| East Coast Caithness | 54 | 1999 | 195,295 | 326,143 | |
| North Coast Caithness | 9 | 2000 | 30,959 | 51,702 | |
| City of Aberdeen | 2 | 1999 | 395 | 660 | |
| East Lothian | 4 | 1999 | 8,266 | 13,804 | |
| Gordon | 6 | 2001 | 3,345 | 5,586 | |
| Kincardine and Deeside | 34 | 1999-2000 | 72,179 | 120,539 | |
| Kirkcaldy | 1 | 1999 | 48 | 80 | |
| Kyle and Carrick | 1 | 2001 | 9,415 | 15,723 | |
| Lochaber | 17 | 1999-2001 | 8,692 | 14,516 | |
| North East Fife | 1 | 2001 | 28,103 | 46,932 | |
| Orkney | 101 | 1999-2002 | 181,026 | 302,313 | |
| East Coast Ross and Cromarty | 5 | 1999 | 1,944 | 3,246 | |
| Shetland | 70 | 1999-2001 | 172,681 | 288,377 | |
| Skye and Lochalsh | 14 | 2000-2001 | 6,495 | 10,847 | |
| Stewartry | 2 | 1998-2000 | 250 | 418 | |
| North-West Coast Sutherland | 26 | 1998-2000 | 162,193 | 270,862 | |
| Western Isles | 89 | 1998-2002 | 120,594 | 201,392 | |
| Wigtown | 8 | 2000-2002 | 3,931 | 6,565 | |
| Subtotal | 566 | 1,952,415 | |||
| Wales | Dyfed | 55 | 1999-2001 | 35,912 | 59,973 |
| Gwynedd | 20 | 1999-2002 | 21,859 | 36,505 | |
| West Glamorgan | 1 | 2001 | 190 | 317 | |
| Subtotal | 76 | 96,795 | |||
| TOTAL | 2,606,117 | ||||
| pairs | 1,303,059 |
a Survey in 1998-2002
b Data from Joint Nature Conservation Committee (328)
c Count corrected by 1.67 (see 328)