Species Account

Select species and region:



Summary Data

Season (Adult / Immature):

National Status: Local

Local Status: Uncommon and thinly distributed resident.

Local Record: Grade 2   See here for explanation

Flight time: Two generations, late Jun-Aug and Sep-Oct, overwinters to Spring

Forewing: 11-13mm.

Foodplant: Pedunculate Oak and Sessile Oak.

IMPORTANT - Please note that the maps and accounts are provisional, subject to change and further update.  The whole dataset still needs to go through the final verification process and it is likely that a very small number of records will not satisfy the present requirements and there are other records that have not been formally submitted.  The information is for guidance only.

Record breakdown:

Year first recorded1973200719851973
Year last recorded2011200720112011
Number of records393156900
Number of individuals425168988
Unique positions147112320
Unique locations112112250
Adult records366155844
Immature records1002

For the region, we have a total of 900 records from 250 sites. Earliest record on file is in 1973.


2423 Oak Nycteoline 07
© Mark Oakley
2423 Oak Nycteoline 06
© Gillian Nash, July 2017
2423 Oak Nycteoline 05
© Paul Harris
2423 Oak Nycteoline 04
© Julian Francis
2423 Oak Nycteoline 03
© Will Bown
2423 Oak Nycteoline 02
© Les Hill
2423 Oak Nycteoline 01
© Tom Morris

Species Account

For further information refer UK Moths.

Davey, P., 2009: A local species in southern England, rare elsewhere, the larva feeding on oak (Quercus spp.). In Dorset, the moth is at low density and found in a wide range of habitats, most often in woodland. The moth has been trapped fairly regularly at Durlston, and in this locality evergreen oak (Quercus ilex) is a likely host plant. It has also been recorded from coastal situations where there is little or no oak, and dispersal or immigration is suspected for many of these: Eype's Mouth, on 13 October 2008, West Bexington, on 21 July 2000, 19 January 2003, 8 July 2003, 12 and 20 February, 20 March, 13 April 2004, four between 20 and 26 July 2004 (R Eden), Portland, on 17 July 2006, 8 October 2006, 7 April 2007, 11 August 2007 (M Cade), Studland Heath, on 21 September 1989 (P Davey), Shell Bay, on 1 October 1990 (P Davey).

The national norm is of a single brood emerging in late August and September before hibernating and becoming active once more between March and May. In Dorset, the moth is double brooded, with a discrete generation between late June and mid-August that is on average twice as large as the winter brood. The post-hibernation population is one and a half times larger than that observed during the autumn, and a partial spring emergence is suspected. The small peak in November may be a partial second brood spawned by the July moths, and the small peak in February corresponds with the winter immigration of 2004.

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