Pale November Moth Geometridae

Maps updated: April 2008

Epirrita christyi (Allen, 1906)

Description: Wingspan 38-42mm.

Similar Species: Adults quite variable; forewings usually darker than November Moth; wavy cross-lines well defined in fresh specimens. Difficult to identify with certainty; requires genital examination. This is important, especially when recording in new areas, where no reliable determinations have been authenticated.

Key Identification Features:

Sets:  male upperside

Flight Period: From early October to mid-November.

Status: Apparently less common than the November Moth E. dilutata, with scattered populations mainly in Down, where specimens have been verified. Reliably recorded from Murlough NNR, Castlewellan and Rostrevor NNR, Down. The true distribution of this species is still unclear and the distribution map merely reflects recording effort.

Ecology: Like the November Moth this is mainly found in woodland and heaths. Adults are attracted to light in reasonable numbers. The larvae can be found from April until June on a variety of trees including maple Acer spp., Blackthorn Prunus spinosa, oak Quercus spp., Hawthorn Crataegus monogyna, Beech Fagus sylvatica and Hazel Corylus avellana. It overwinters as an egg.

World Distribution: Similar to the November moth.

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=5876

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