Ectropis crepuscularia
Photo courtesy of Entomart.be
Female
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Arthropoda
Class:	Insecta
Order:	Lepidoptera
Family:	Geometridae
Genus:	Ectropis
Species:	E. crepuscularia
Binomial name
Ectropis crepuscularia (Denis & Schiffermüller, 1775)
Synonyms
Ectropis bistortata Goeze, 1781

The engrailed and small engrailed (Ectropis crepuscularia) are moths of the family Geometridae found from the British Isles through Central and Eastern Europe to the Russian Far East and Kazakhstan. The western Mediterranean and Asia Minor and the Caucasus represent the southern limit of the distribution (with the Balkan countries). In the north, the distribution area ends at the Arctic circle. It also occurs in North America. Debate exists as to whether they make up one species, or whether E. crepuscularia actually refers only to the small engrailed, with the engrailed proper being separable as E. bistortata.^[1][2]

The ground colour of the wings is buff or grey, variably marked with darker fascia and a pale postdiscal crossline. The darker markings are not usually as strong as in the rather similar willow beauty. Melanic forms occur fairly frequently. The wingspan is 38–45 mm. One or two broods are produced each year. In the British Isles, the adults can be seen at any time between March and August; this time range may vary in other parts of this moth's range. The species flies at night and is attracted to light.

The greyish caterpillar is truly polyphagous, feeding on a huge range of plants. The species overwinters as a pupa.

• Acer, maple
• Aconitum, monkshood
• Alnus, alder
• Aquilegia, columbine
• Betula, birch
• Calluna vulgaris, heather
• Camellia japonica, Japanese camellia
• Castanea, chestnut
• Centaurea, star thistle
• Cirsium arvense, creeping thistle
• Cornus, dogwood
• Daphniphyllum
• Diervilla, bush honeysuckle
• Frangula, alder buckthorn
• Fraxinus, ash
• Genista, broom
• Glycine, soybean
• Hypericum maculatum, imperforate St. John's wort
• Ilex, holly
• Juglans, walnut
• Larix, Larch
• Lindera, spice bush
• Lonicera, honeysuckle
• Lythrum salicaria, purple loosestrife
• Malus, apple
• Philadelphus, mock-orange
• Picea, spruce
• Pieris
• Pinus, pine
• Plectranthus
• Populus, poplar
• Pseudotsuga, Douglas fir^[3]
• Quercus, oak
• Ribes rubrum, redcurrant
• Rosa, rose
• Rubus idaeus, raspberry^[4]
• Rumex, dock
• Salix, willow
• Sambucus, elder
• Shepherdia canadensis, Canada buffaloberry
• Sorbus spp., rowans
• Spartina, cordgrass
• Thuja
• Trifolium, clover
• Tsuga, hemlock
• Ulmus, elm
• Vaccinium
• Zanthoxylum

• 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

• Funet.fi
• Lepidoptera Mundi by Christopher Jonko
• Lepiforum.de
• UK Moths