Geometridae: Sterrhinae

08174 Treble Brown Spot Idaea trigeminata, (Haworth, 1809)

BF1711 (ABH70.012)


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:


Woodland rides and edges and hedgerows.

Regional Information

There are no records in the system yet in Bulgaria.

Similar Species
Small Fan-footed Wave Idaea biselata
Single-dotted Wave Idaea dimidiata

Larva Type:
Grey, brown, white
No. of Proleg Pairs: