Dark Tussock Lymantriidae

Dicallomera fascelina (Linnaeus, 1758)

Description: Wingspan 40-53mm. Adults are generally a dull grey. The forewings are grey with dark costal marks, but in some specimens suffused with dark ochreous-yellow. There is also a black dotted line along the outer margin of the forewing. The hindwings are unmarked, pale grey.

Key Identification Features:

Sets:  male upperside

Flight Period: Early June to late July.

Status: A scarce, local species that is apparently restricted to a few boggy localities in north Armagh, including Peatlands Park and the Argory. There are old records from Tamnamore, Tyrone and Tempo, Fermanagh. It may occur more widely in upland areas in the west where recording has been less intensive.

Ecology: An attractive species of intact bogs and moorland. Adults are attracted to light but appear only occasionally even at well-known localities. The larvae can be found in August and September and, after overwintering, in the May of the following year. They are occasionally seen resting exposed on the tips of heather stems in late summer prior to hibernation. They have been recorded on Heather Calluna vulgarisin N. Ireland. Other recorded foodplants include willow Salix spp., Broom Cytisus scoparius, birch Betula spp. and Bramble Rubus fruticosus. It overwinters as a larva.

World Distribution: Throughout northern and central Europe as far east as Siberia.

Bradley & Fletcher number: 2027 Agassiz number: 72.016

Additional information:

UK Moths account

Caterpillar: 

 Thompson, R. S. & Nelson, B., 2003 (Oct 2). [In] The Butterflies and Moths of Northern Ireland
http://www.ulstermuseum.org.uk/lepidoptera/species.asp?item=6113

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