Species List for South Stack 1999
 Angle Shades
 Annulet
 Antler
 Brown-line Bright-eye
 Cabbage
 Chevron
 Cloaked Minor
 Common Carpet
 Common Rustic sp.
 Crescent Dart
 Dark Arches
 Dark Sword-grass
 Dotted Clay
 Gold Spangle
 Gold Spot
 Grass Emerald
 Large Yellow Underwing
 Least Yellow Underwing
 Lesser Broad-bordered Yellow Underwing
 Lesser Yellow Underwing
 Lychnis
 Narrow-winged Pug
 Northern Rustic
 Nutmeg
 Rosy Minor
 Ruby Tiger
 Silver Y
 Small Square Spot
 Square Spot Dart
 Square Spot Rustic
 True Lover's Knot