Main: (Geometridae / Archiearinae)
70.203 [B&F: 1661] Orange Underwing (Archiearis parthenias) (Linnaeus, 1761)


Local in open woodland, scrubby heathland, embankments, and other rough open ground throughout much of the British Isles. In Hampshire and on the Isle of Wight has declined or disappeared altogether in many areas due to destruction of its birch woodland habitat and most often seen now in the New Forest and the north-east. Wingspan 35-39 mm. A diurnal flyer, seen in warm spring sunshine, often high amongst the branches but occasionally seen well on the ground - it seems to have an attraction to horse dung. They should be netted for examination: those netted are invariably males. Very similar to Light Orange Underwing B. notha, males can be distinguished by their antennae which are finely serrated in Orange Underwing, and are slightly feathered in Light Orange Underwing; on underside of hindwing of Orange Underwing, orange band projects centrally into dark outer band, often reaching outer margin, while in Light Orange Underwing, dark outer band is unbroken, and central projection of orange band is absent (MBGBI Vol 7 part 2). Larva feeds on Downy and Silver Birch, over-wintering as a pupa.

Flightime guide

Records Received By Year

% of total records
Max records: 30
00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19

Percentage of Total Records

Total records
Max Percentage: 0.02235203
00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19

Phenology - Adult Records

Max records: 70
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Phenology - Larval Records

Max records: 1
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Distribution Map

Historical distribution at tetrad resolution
Click for density map

Record Density

As above but the larger the symbol, the greater the number of records
Click for distribution map

Web Hosting from Vision Internet Limited