| # | County | Records since 2000 | Species recorded | Area |
|---|---|---|---|---|
| 1 | Causeway Coast and Glens | 190,348 | 4,820 | 1,980 km² |
| 2 | Ards and North Down | 131,147 | 4,117 | 460.8 km² |
| 3 | Newry, Mourne and Down | 100,772 | 5,020 | 1,633 km² |
| 4 | Belfast | 94,505 | 2,839 | — |
| 5 | Fermanagh and Omagh | 93,806 | 4,577 | 2,857 km² |
| 6 | Armagh City, Banbridge and Craig | 85,832 | 3,466 | — |
| 7 | Mid and East Antrim | 72,718 | 4,053 | 1,046 km² |
| 8 | Antrim and Newtownabbey | 68,486 | 3,319 | 572.0 km² |
| 9 | Lisburn and Castlereagh | 67,638 | 2,604 | 505.3 km² |
| 10 | Mid Ulster | 31,882 | 3,209 | — |
| 11 | Derry City and Strabane | 18,863 | 1,851 | 1,238 km² |