| *Species | *No. | *Stage | *Site | *(Vice)County | *Date | *Recorder(s) | Comments |
| Orange tipped | 1 | adult | St Vincent's Sec Sch, Dundalk | Louth | 5-Apr-08 | Don Hodgers | |
| Small tortoiseshell | 1 | adult | Seabank, Castlebellingham | Louth | 13-Apr-08 | Don Hodgers | |
| Small tortoiseshell | 1 | adult | Lurgangreen | Louth | 13-Apr-08 | Don Hodgers | |
| Small tortoiseshell | 1 | adult | Keenan's Cross Pond | Louth | 13-Apr-08 | Don Hodgers | |
| Holly blue | 1 | adult | St Vincent's Sec Sch, Dundalk | Louth | 15-Apr-08 | Don Hodgers | |
| Holly blue | 1 | adult | Avenue Rd, Dundalk | Louth | 21-Apr-08 | Don Hodgers | |
| Speckled wood | 1 | adult | Avenue Rd, Dundalk | Louth | 21-Apr-08 | Don Hodgers | |
| Holly blue | 1 | adult | Eccles St., Dublin | Dublin | 23-Apr-08 | Don Hodgers | |
| Holly blue | 1 | adult | Avenue Rd, Dundalk | Louth | 26-Apr-08 | Don Hodgers | female |
| Holly blue | 5 | adult | DkIT grounds, Dundalk | Louth | 26-Apr-08 | Don Hodgers | |
| Holly blue | 1 | adult | Rathescar Pond | Louth | 26-Apr-08 | Don Hodgers | |
| Speckled wood | 4 | adult | Rathescar Pond | Louth | 26-Apr-08 | Don Hodgers | |
| Orange tipped | 2 | adult | Reynoldstown | Louth | 27-Apr-08 | Don Hodgers | pair |
| Speckled wood | 2 | adult | Reynoldstown | Louth | 27-Apr-08 | Don Hodgers | |
| Orange tipped | 1 | adult | Draghanstown | Louth | 27-Apr-08 | Don Hodgers | male |
| Small tortoiseshell | 1 | adult | Lurgangreen | Louth | 27-Apr-08 | Don Hodgers | |
| Speckled wood | 4 | adult | Hermitage | Louth | 27-Apr-08 | Don Hodgers | |
| Holly blue | 2 | adult | St Vincent's Sec Sch, Dundalk | Louth | 1-May-08 | Don Hodgers | |
| Orange tipped | 1 | adult | Avenue Rd, Dundalk | Louth | 2-May-08 | Don Hodgers | male |
| Speckled wood | 1 | adult | Avenue Rd, Dundalk | Louth | 2-May-08 | Don Hodgers | |
| Peacock | 2 | adult | Mullaghattin | Louth | 2-May-08 | Don Hodgers | |
| Speckled wood | 2 | adult | Mullaghattin | Louth | 2-May-08 | Don Hodgers | |
| Holly blue | 1 | adult | Avenue Rd, Dundalk | Louth | 3-May-08 | Don Hodgers | |
| Green-veined white | 3 | adult | Mullaghattin | Louth | 3-May-08 | Don Hodgers | 2 males, 1 female |
| Speckled wood | 2 | adult | Johnstown | Louth | 4-May-08 | Don Hodgers | |
| Brimstone | 8 | adult | L. Bunny | Clare | 5-May-08 | Don Hodgers | 5 males, 3 females |
| Brimstone | 5 | adult | Skaghard Lough | Clare | 5-May-08 | Don Hodgers | 3 males, 2 females |
| Peacock | 2 | adult | L. Bunny | Clare | 5-May-08 | Don Hodgers | |
| Speckled wood | 6 | adult | L. Bunny | Clare | 5-May-08 | Don Hodgers | |
| Small white | 2 | adult | L. Bunny | Clare | 5-May-08 | Don Hodgers | |
| Orange tipped | 1 | adult | L. Bunny | Clare | 5-May-08 | Don Hodgers | |
| Small tortoiseshell | 1 | adult | L. Bunny | Clare | 5-May-08 | Don Hodgers | |
| Peacock | 2 | adult | L. Bunny | Clare | 5-May-08 | Don Hodgers | |
| Holly blue | 3 | adult | St Vincent's Sec Sch, Dundalk | Louth | 6-May-08 | Don Hodgers | |
| Speckled wood | 1 | adult | St Vincent's Sec Sch, Dundalk | Louth | 7-May-08 | Don Hodgers | |
| Holly blue | 1 | adult | St Vincent's Sec Sch, Dundalk | Louth | 7-May-08 | Don Hodgers | |
| Holly blue | 1 | adult | St Vincent's Sec Sch, Dundalk | Louth | 8-May-08 | Don Hodgers | |
| Holly blue | 1 | adult | Avenue Rd, Dundalk | Louth | 10-May-08 | Don Hodgers | |
| Holly blue | 2 | adult | Clogherhead | Louth | 11-May-08 | Don Hodgers | |
| Small white | 3 | adult | Clogherhead | Louth | 11-May-08 | Don Hodgers | one male, two females |
| Small tortoiseshell | 1 | adult | Clogherhead | Louth | 11-May-08 | Don Hodgers | |
| Small white | 3 | adult | Clogherhead | Louth | 11-May-08 | Don Hodgers | |
| Green-veined white | 1 | adult | Clogherhead | Louth | 11-May-08 | Don Hodgers | |
| Green-veined white | 1 | adult | Cruisetown | Louth | 11-May-08 | Don Hodgers | |
| Speckled wood | 1 | adult | Dunany | Louth | 11-May-08 | Don Hodgers | |
| Speckled wood | 1 | adult | Seabank, Castlebellingham | Louth | 11-May-08 | Don Hodgers | |
| Small white | 1 | adult | Seabank, Castlebellingham | Louth | 11-May-08 | Don Hodgers | |
| Orange tipped | 1 | adult | Seabank, Castlebellingham | Louth | 11-May-08 | Don Hodgers | male |
| Orange tipped | 1 | adult | Avenue Rd, Dundalk | Louth | 13-May-08 | Don Hodgers | male |
| Holly blue | 1 | adult | Avenue Rd, Dundalk | Louth | 13-May-08 | Don Hodgers | |
| Speckled wood | 3 | adult | Avenue Rd, Dundalk | Louth | 14-May-08 | Don Hodgers | |
| Small white | 1 | adult | St Vincent's Sec Sch, Dundalk | Louth | 14-May-08 | Don Hodgers | |
| Small white | 1 | adult | St Vincent's Sec Sch, Dundalk | Louth | 15-May-08 | Don Hodgers | |
| Real's wood white | 8 | adult | Keenan's Cross Pond | Louth | 17-May-08 | Don Hodgers | including pair courtship display |
| Common blue | 15 | adult | Keenan's Cross Pond | Louth | 17-May-08 | Don Hodgers | at least 15, males and females, no mating observed |
| Green-veined white | 8 | adult | Keenan's Cross Pond | Louth | 17-May-08 | Don Hodgers | including two mating pairs |
| Speckled wood | 2 | adult | Keenan's Cross Pond | Louth | 17-May-08 | Don Hodgers | |
| Orange tipped | 1 | adult | Keenan's Cross Pond | Louth | 17-May-08 | Don Hodgers | male |
| Small white | 1 | adult | Rathescar Pond | Louth | 17-May-08 | Don Hodgers |