Sterrhines (Sterrhinae) are a sub-family of the Geometer Moths (Geometridae) with some 2,800 described species.
Maiden’s Blush – 2019 (NL)
A moth with no eyelets on the front or rear wing is the Maiden’s Blush (Cyclophora punctaria). The base colour is light brownish-yellow with the rear wing slightly lighter in colour. Some specimens, especially the summer generation, have a large reddish blush on the front wing. Square reddish-brown spots can sometimes be seen near the inner edge corner. A reddish centre transverse line runs across the wings, sloping to the front edge at an angle of less than 90 °. The outer transverse line of dots is wavy and deviates near the inner edge of the wing towards the inner edge corner. Sometimes the wings are speckled black. The flight period is from April to the end of August in two generations and the wingspan is 26-32mm. Host plant: Oak and Birch. Dutch name: Gestippelde oogspanner. Frisian name: –
Riband Wave – 2009 (NL)
The Riband Wave (Idaea aversata) basically has two clearly different variations. That difference is situated in the middle band. On the light yellow-brown wings there are many dark grey scales and three, two of which are clearly visible, transverse lines. In some specimens, the band between the two outer transverse lines is dark-coloured, so that a clearly visible band runs over the wings. There is a clear dot on both the front and rear wings. The Riband Wave flies in two generations from June to September and the wingspan is 28-32mm. Host plant: Bedstraws, Wood Aven, dandelions and docks. Dutch name: Grijze stipspanner. Frisian name: Grize stipspanner.
Small Dusty Wave – 2015 (NL)
The Small Dusty Wave (Idaea seriata) has a clear centre spot on all wings. The inner and outer transverse lines are thin but always clearly visible. The fringe line along the trailing edge consists of alternating bows and dots and in some specimens, a yellowish colour can be seen in the fringe. The wings are further dark speckled. He flies in two generations from May to October and the wingspan is 19-21mm. Host plant: Herbaceous plants, including Ivy. Dutch name: Paardenbloemspanner. Frisian name: Hynsteblomspanner.
Portland Ribbon Wave – 2018 (FR)
I couldn’t find a Dutch name for the Portland Ribbon Wave (Idaea degeneraria). On the internet, there was an English and German name for this moth but no Dutch name. Possibly because this moth is hardly seen in the Netherlands. Therefore I derived a Dutch name from the foreign languages. This fairly large moth has two colours, brown and pale white. The outer part of the front and rear wings is pale white and the inner half brown, the part closest to the wing root being lighter brown. A clear black dot can be seen on both the front and rear wings. The flight period is from April to September in two generations and the wingspan is 26-31mm. Host plant: Dandelion and Knotgrass. Dutch name: Tweekleurige bandspanner. Frisian name: –
Single-dotted Wave – 2019 (NL)
A nice surprise in the light trap after a cloudy summer night was the Single-dotted Wave (Idaea dimidiata). The base colour of the wings is straw-coloured whitish to greyish light brown. The black dots in the middle are always clearly visible. The central transverse lines are usually thin and faintly visible except for the dots on the veins. The outer transverse line is usually visible with the characteristic black tip at the leading edge. The fringe line is provided with a row of black dots and at the inner edge corner, there are striking closely adjacent black spots. The wingspan is 13-18mm. The flight period is from June to August and sometimes a second generation in September. Host plant: Cow Parsley and Burnet Saxifrage. Dutch name: Vlekstipspanner. Frisian name: Flekstipspanner.
Small Fan-footed Wave – 2020 (NL)
The Small Fan-footed Wave (Idaea biselata) with cream-coloured and dark speckled wings has a number of resembling species. A central black dot can be seen on both the front and rear wings. The centre transverse line on the front wing curves around this dot in a small arc. In the Small Dusty Wave (Idaea seriata), the middle transverse line runs close to the centre spot. Characteristic is the jagged outer transverse line with a grey-brown zoom field outside that is interrupted by an irregular light wave line. With the Single-dotted Wave (Idaea dimidiata), the zoom field only has a number of dark spots. In addition, the sharply deflected wingtip of the Small Fan-footed Wave is striking. The wingspan is 15-20mm and the flight period runs from May to the end of September in one or sometimes two generations. Host plant: Various herbaceous plants and fallen leaves. Dutch name: Schildstipspanner. Frisian name: Skyldstipspanner.
Lesser Cream Wave – 2017 (NL)
The Lesser Cream Wave (Scopula immutata), a relative small member of the Sterrhines, has wings with thinly scattered black scales. The male’s wings are creamy-white and the female’s white. The light yellow transverse lines are clearly visible and are undulated. There is always a clearly visible black dot on the rear wing. The fringe line is darker and often there are faint spots here. He flies in one generation from June to September and the wingspan is 24-27mm. Host plant: Meadowsweet. Dutch name: Bosspanner. Frisian name: Boskspanner.
Blood-vein – 2008 (FR)
The Blood-vein (Timandra comae) is easily recognized by the pink-red or sometimes brownish-red line that runs from the tip of the wing over the cream-coloured front wing to the inner edge. The trailing edge of the rear wing also has a thin rose-red line or a fuzzy strip, but some specimens lack that colour. There is still a thin grey line under the wider coloured middle band. Furthermore, the Blood-vein has a distinct black point near the leading edge of the wings. He flies in usually three generations from May to October and the wingspan is 30-46mm. Host plant: Common Sorrel and Knotgrass. Dutch name: Lieveling. Frisian name: Readrânespanner.