Species Account

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Summary Data

Season (Adult / Immature):

National Status: Nb

Local Status: Rare and very local resident.

Local Record: Grade 4   See here for explanation

Flight time: Late Mar-early Jun.

Forewing: 8-9mm.

Foodplant: 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 recorded188519881885
Year last recorded201119882011
Number of records41184
Number of individuals1161234
Unique positions25152
Unique locations19140
Adult records40182
Immature records000

For the region, we have a total of 84 records from 40 sites. Earliest record on file is in 1885.


1818 Marbled Pug 01
© Chris Manley, 10 Apr 2004

Species Account

For further information refer UK Moths.

Davey, P., 2009: A local species restricted to southern England, the larva feeding on oak (Quercus spp.). In Dorset, the moth is very local and tends to colonise old oak woods; current sites include: Powerstock Common, Deadmoor Common, Melcombe Park, Oakers Wood, Arne Wood, and historical sites include Wootton Wood and Chamberlaynes. Reduction in old oak and birch woodland to make way for conifer plantation has undoubtedly reduced the number of colonies across the county. Managing a varied age structure of oak could be beneficial to maintaining this species at the above oak woodland sites. Singletons trapped at West Bexington and St Ives well away from potential core habitat, suggest occasional dispersal.

The following account is of a moth flying during the day at Corfe Castle on 24 April 1893: "Heat still intense. Max. shade temperature 67°F. Hurrah for Purbeck! While walking through our Corfe River copse this evening I noticed a small Geometer flying about under an oak tree. It presently settled on a leaf of sallow, and I stood lost in admiration for it proved to be a magnificent specimen of E.irriguata which is quite new to the Purbeck list though I have always rather expected that it might occur here. I gazed at it for some time wondering how in the world I could catch it as it was sitting awkwardly among the leaves and I was net-less, worse luck! Finally I made an attempt to slip a box over it, but it was too wide-awake, and although I got it between my closed hands it escaped and flew off into the brushwood! 'Veni, Vidi' but I cannot truthfully add 'Vici'" (Reverend E Bankes).

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