Geometridae: Sterrhinae

1711 (ABH70.012) Treble Brown Spot Idaea trigeminata, (Haworth, 1809)

KR08174

Earith
Earith
 Photo © David Griffiths
Earith
 Photo © David Griffiths
 pre-2000
 2000-2009
 2010-2019
 2020-onwards
Earith
Earith
 Photo © David Griffiths
Hemingford Grey
Hemingford Grey
 Photo © Nick Greatorex-Davies
Hemingford Grey
Hemingford Grey
 Photo © Nick Greatorex-Davies
Hemingford Grey, at night, June 2006
Hemingford Grey, at night, June 2006
 Photo © Nick Greatorex-Davies


General Information

The dark brown outer cross-band, on the otherwise plain straw-white forewing is diagnostic. The band is pinched in two places, forming three dark brown blotches extending outwards from the cross-line. The blotch near the leading edge us only linked by a thin cross-line, but the other blotches are often merged. There is a conspicuous central dot on all four wings.

 

Pupates in loose earth.

Overwinters as Overwinters as a larva.
Both sexes readily come to light, sometimes in numbers.

Forewing length: 10-11mm.
Foodplant(s): herbaceous plants
Flying: Two generations, late May-July and late July-late September
UK Presence: Resident
National status: Local

Habitat

Woodland rides and edges and hedgerows.

Regional Information

Recorded in 65 (24.1%) of the 270 2km squares of Huntingdonshire.

Last recorded in August 2019

Recorded date range (Adult): 24 March to 20 October

Recorded date range (Larva/Leafmine): 02 July to 02 July

Similar Species
Earith
Earith
 Photo © David Griffiths
Small Fan-footed Wave Idaea biselata
Great Staughton
Great Staughton
 Photo © Peter Bissell
Single-dotted Wave Idaea dimidiata

Local
Larva/Leafmine:
Larva Type:
Hairy
Colours:
Grey, brown, white
No. of Proleg Pairs:
2