Straw Dot Noctuidae

Maps updated: April 2008

Rivula sericealis (Scopoli, 1763)

Description: Wingspan 19-25 mm. Forewings pale straw or yellow-brown becoming darker towards the termen. There is a small dark brown-coloured dot in the central area near the costa. Hindwings pale whitish brown with darker veining.

Key Identification Features:

Sets:  male upperside

Flight Period: Mid-June to late August.

Status: Common and widespread across southern counties, scarcer further north with several recent records from mainly coastal areas of Antrim and Londonderry.

Ecology: A small species associated mainly with fens, damp grassland and heaths. Adults are active from dusk onwards and are attracted to light in small numbers. The larvae feed from August to May on various grasses. It overwinters as a larva.

World Distribution: Eurasiatic; common and widespread across western Europe in damp areas as far north a Finland.

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=6578

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