Site: Halvorset
| Species | Scientific name | 1999 |
|---|---|---|
| Small Pearl-bordered Fritillary | Boloria selene | 2 |
| Mazarine Blue | Cyaniris semiargus | 3 |
| Large Grey | Scoparia subfusca | 1 |
| Lesser Marbled Fritillary | Brenthis ino | 1 |
| Small Heath | Coenonympha pamphilus | 1 |
| Large Skipper | Ochlodes sylvanus | 1 |
| Red Carpet | Xanthorhoe decoloraria | 1 |
| Forester | Adscita statices | 2 |
| Ringlet | Aphantopus hyperantus | 1 |
| Gullrisengmott | Anania funebris | 1 |
| Large Wall Brown | Lasiommata maera | 1 |
| Lampronia rupella | 1 | |
| Heath Fritillary | Melitaea athalia | 1 |
| Cranberry Blue | Plebejus optilete | 2 |
| Moorland Clouded Yellow | Colias palaeno | 1 |
| Common Lutestring | Ochropacha duplaris | 1 |
| Clouded Buff | Diacrisia sannio | 1 |
| Mountain Argus | Aricia artaxerxes | 2 |
| Dingy Skipper | Erynnis tages | 1 |
| Thistle Conch | Aethes cnicana | 1 |
