Light Orange Underwing

  • Light Orange Underwing
    Light Orange Underwing

Scientific name: Archiearis notha

March to April. Southern England. With mottled brown forewings and orange underwings. Often found near aspen in open woodland.

This medium-sized moth can be confused with the Orange Underwing, but can be distinguished from that species on several characters. It is generally smaller and the forewing is less variegated than that of the Orange Underwing. On the underside of the hindwing the dark outer band is unbroken. Additionally the Orange Underwing usually flies about two weeks earlier than the Light Orange Underwing, the former being associated with birch.

A spring species usually seen flying in sunshine around the tops of Aspen. Less active in the late afternoon. Sometimes found lower down or on the ground visiting puddles.

Size and Family

  • Family – Orange Underwings (Archiearines)
  • Medium Sized
  • Wingspan Range - 30-34mm

Conservation status

  • UK BAP: Not listed
  • Scarce (Nationally Scarce B)

Caterpillar Food Plants

Aspen (Populus tremula)


Found in open woodland where mature catkin-bearing Aspen are frequent.


  • Countries – England
  • Found in England south of the Wash and east of the Severn. Formerly reported from the Wye Valley. Restricted in distribution, being confined to areas of suitable habitat.

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