Idaea trigeminata (Haworth, 1809)
Treble Brown Spot
70.0120 (B&F: 1711)
»Suborder: Glossata
»Superfamily: Geometroidea
»Family: Geometridae
»Subfamily: Sterrhinae
»Tribe: Idaeini
A resident that generally occurs singly or sparingly but is sometimes fairly common to common at mv light in a wide range of habitats, deciduous woodland being the most favoured. Widely distributed, but very local and distinctly episodic in any numbers. Normally double-brooded, flying mainly from early June to the third week of July and again from late July to late August. Adults have been seen in every week from the second week of May to late August. A possible third emergence is indicated by sightings on September 16th at Winchelsea Beach and September 25th in 2006 at Rusper and on September 25th again, this time in 1997 at Walberton (Arundel). The larval foodplant has not been recorded in the wild, although Ivy and Knotgrass have been utilised in captivity. (Pratt, 2011)
