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1661 ~ Orange Underwing ~ Archiearis parthenias
UK Status

Resident. Local.

Montgomeryshire Status

Records from 1998 (Lake Vyrnwy) and 2012 (Llanymynech Rocks). This day flying species is probably under recorded, flying as it does, around the tops of birch trees in March/April.

Wingspan :  M & F, 35-39mm.

Confusion species

Light Orange Underwing.


Flight time (Montgomeryshire)

Habitat

Open woodland, scrub & open ground.

Foodplant

Downy birch and silver birch.

Lifestage data

Eggs laid on twigs in time for larvae to feed on opening catkins. Then feed on younger leaves when larger, hiding between spun leaves during day. Larva Apr-June. Overwinters as pupa. 
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Montgomeryshire photos

Photo by AH, 24th Mar 2012, Llanymynech Rocks