Mottled Umber

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Mottled Umber
Erannis defoliaria01.jpg
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Lepidoptera
Family: Geometridae
Genus: Erannis
Species: E. defoliaria
Binomial name
Erannis defoliaria
(Clerck, 1759)
Synonyms

Phalaena defoliaria Clerck, 1759

Mottled Umber in caterpillar form, Germany

The Mottled Umber (Erannis defoliaria) is a moth of the family Geometridae. It is a common species throughout much of the Palearctic region.

Distribution[edit]

The species can be found in West Europe from North Scandinavia to the North Mediterranean region then East to the Caucasus, North Iran, Russia , Russian Far East, and Ussuri.

Wingless female
Illustration from John Curtis's British Entomology Volume 6

Description[edit]

The female of this species is wingless and rather spider-like and can be found on the trunks and stems of its larval food plants. She is white or yellow and black-patched. The male is fully winged (wingspan 40–45 mm) and very variable. The ground colour of the forewing is pale yellow or light yellow ochre and suffused dark grey.The basal and distal fasciae are dark brown.The basal fascia is bordered on the inner side by a brown cloud; the distal fascia has a brown cloud on the outer edge.There is also a brown cloud along the costa.There are two dark brown oblong spots in the upper half of the terminal area. The hindwing is grey-white with grey suffusion.There is a grey-black discal spot on both wings.There are numerous and significant deviations from this colour pattern and some specimens are very dark. Truly melanic forms are also frequent. As with the Peppered Moth, the darker forms tend to be prevalent in industrial areas.

Biology[edit]

The adults are active from September to December [1] and the males are attracted to light.

The larva is also very variable from cream to dark brown. It feeds on a wide variety of trees and shrubs (see list below) and can be a serious pest in orchards. The species overwinters as an egg.

Caterpillar
  1. ^ The flight season refers to the British Isles. This may vary in other parts of the range.

Recorded food plants[edit]

References[edit]

  • Chinery, Michael Collins Guide to the Insects of Britain and Western Europe 1986 (Reprinted 1991)
  • Skinner, Bernard Colour Identification Guide to Moths of the British Isles 1984
  • The pest control of the chestnut tree by Dr Péter Szentiványi. Chestnut - Agricultural Publisher. For Sarkpont Cc., Hungary.

External links[edit]