| Single-dotted wave | |
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Scientific classification | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Class: | Insecta |
| Order: | Lepidoptera |
| Family: | Geometridae |
| Genus: | Idaea |
| Species: | I. dimidiata |
| Binomial name | |
| Idaea dimidiata (Hufnagel, 1767) | |
Idaea dimidiata, thesingle-dotted wave, is amoth of the familyGeometridae. It is aHolarctic species.
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The species has awingspan of 13–18 mm. The ground colour of the wings is brownish yellow, brownish white to slightly reddish white. The pattern elements are dark grey to dark brown. The median band and the two crosslines can be incomplete or interrupted. They are marked by so-called costal stains on the front wing at the costa. There is a light wavy line, which is limited mainly to the inside edge and marked on both sides by dark stains in the marginal field. The fore and hindwings have black discal flecks, which are occasionally significantly weaker on the forewings. Marginal stains are connected by a thin line.The larva is long and thin, grey-brown, with a V-shaped dark spot on each body segment.[1][2][3]
The species occurs in the WesternPalearctic and in theNearctic. The species is widespread in West, South and CentralEurope. In the North the range extends to South Scandinavia, and East to theUrals. Idaea dimidiata is found on almost all islands of theMediterranean.
Outside Europe it is found inMorocco and NorthwesternTurkey, theCaucasus andTranscaucasia, from North Iran it extends toAfghanistan andCentral Asia. InCyprus, Turkey and theLevant in the South dimidiata antitaurica replaces dimidiata dimidiata, which also occurs inCanada and the most northern regions of theUnited States of America.
The adults fly at night from June to August, occasionally later,[1] and are attracted to light.
The species prefers damp locations such as marshy woodland, fens and river banks.
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