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Autumnal Moth
Scientific classification
Kingdom:	Animalia
Phylum:	Arthropoda
Class:	Insecta
Order:	Lepidoptera
Family:	Geometridae
Genus:	Epirrita
Species:	E. autumnata
Binomial name
Epirrita autumnata Borkhausen, 1794

The Autumnal Moth (Epirrita autumnata) is a moth of the family Geometridae. It is found throughout the Palearctic region and the Near East and has a much wider distribution than its two close relatives (see below). In Lapland, in some years the numerous autumnal moth larvae may defoliate square miles of birch forests on mountains.

This species is very similar to the November Moth and Pale November Moth and identification is usually only possible by examining the genitalia. In general this is the least variable of the three with melanic forms occurring less often. It is also usually on the wing earlier in the year, flying in September and October ^[1], although the flight seasons of all three species overlap.

The larva feeds on a wide variety of trees and shrubs (see below). The species overwinters as an egg.

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

Recorded food plants

• Abies – Fir
• Alnus – Alder
• Betula – Birch^[1]
• Carpinus – Hornbeam
• Corylus – Hazel
• Crataegus – Hawthorn
• Larix – Larch
• Lonicera – Honeysuckle
• Malus – Apple
• Picea – Spruce
• Pinus – Pine
• Populus – Poplar
• Prunus
• Pseudotsuga – Douglas-fir^[2]
• Quercus – Oak
• Salix – Willow
• Sorbus – Rowan
• Thuja – Western Redcedar
• Tilia – Lime
• Tsuga – Hemlock
• Ulmus – Elm
• Vaccinium
• Viburnum – Nannyberry

Subspecies

• E. a. altivagata
• E. a. autumnata

References

Michael Chinery Collins Guide to the Insects of Britain and Western Europe 1986 (Reprinted 1991)

Bernard Skinner Colour Identification Guide to the Moths of the British Isles 1984

Sadik Tuzun and Elizabeth Bent (2006) Multigenic and Induced Systemic Resistance in Plants, published by Birkhäuser, 521 pages ISBN 0387232656

Line notes

External links

• Autumnal Moth at hlasek.com