63.1171 BF1351  –  Crambidae –  Acentropinae – Parapoynx diminutalis – Hydrilla Leafcutter Moth – (Snellen, 1880) Adult Micro:  CAT 3 – Very Rare/Scarce/Migrant/Adventive – confusion with leaf mines       PDF Icon – click for General Verification Guidelines  |   PDF Icon – click for Specific Verification Guidelines
Brown –  Significant Record / Very Rare / Vagrant        orange – Migrant
Taxonomy:   Micro   >>  Crambidae  >> Acentropinae
** A photograph is required **
Other Name/s: Nymphula diminutalis
ID Difficulty:  Red – difficult to identify – detailed examination required, often a Gen Det and/or specimen and quality photographs are required.
ID pointers: A small “pug-like” crambid that is quite distinctively marked with cross-bands of sandy/ornage-brown and white, with a prominent discal spot.
Distribution:  (Last record: 4 December 1974 at Holloway )  –  An adventive that has naturalised in aquatic nurseries, accidentally introduced in aquatic plants imported from Singapore since 1977.
Incredibly a record exists from Holloway 12/4/1974 of a female specimen found in a house. (Harrison & Sterling; DaNES)
Flight Period: June /  July /  August /  September /  October /  –  Can be seen any time of year but peak seems to be May – October Photographed: No –  Photographed By: Not Recorded
*** Last updated on 21 June 2025 by TD ***
Wingspan: 13-19mm
Food Plant: Aquatic plants
Last Recorded Year: 1974
Last Recorded By – DaNES
Last Recorded General Area – Holloway

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Distribution Map for Parapoynx diminutalis

No records found

If the Map Layers function fails, just refresh the page and it should be OK after. Use the +- zoom on the top left, or on a tablet, use two fingers to zoom. Remember, the last layer you ticked is the one which displays the popup information - they sit on top of each other - de-select then re-select, to see the popup values.

******* Choose ONLY one at a time, of either Monad, Tetrad or Hectad Distribution - each has it's own set of data. Also, the distribution maps cover ALL recorded data. *******

Bedrock Geology ** indirectly affects moth distribution by influencing the type of habitat and food plants available in an area. In turn, this may affect the types of moths that can thrive, or where they can most likely be found.

Land-cover * shows the variety of land-cover within the VC57 area, based on the CORINE (Coordination of Information on the Environment) forty-four thematic classes of land-cover. This will show, to a greater or lesser degree, the number and variety of moths found in different land-cover types. The UK continues to operate within the Copernicus programme, with the UK Centre for Ecology & Hydrology (UKCEH) providing Corine Land Cover (CLC) datasets for the UK and its territories.


NBN Atlas UK Distribution for – Parapoynx diminutalis

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Note – the NBN Atlas datasets are listed in the map below and vary in their currency (uptodateness) – however, the map does give a general indication of the moth's distribution across the UK.

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Monthly Records By Year: Parapoynx diminutalis
( data includes both Larvae and Adult Stages )
No data returned from the database.

Monthly Counts By Year: Parapoynx diminutalis
( data is based on 'Adult' stage records only. )


First/Last Recorded Dates: Parapoynx diminutalis
Adult-only & Anything [Larvae, Pupae, Adult, Mines]

Shading shows moth presence between dates

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Recordings By Year: Parapoynx diminutalis
( All data includes both Larvae and Adult Stages )
Annual Growth Rate (AGR): Parapoynx diminutalis
AGR: 0%   |   Total % Change: 0%
Parapoynx diminutalis
Insufficient records/data for an AGR analysis
Years Analysed: 2000 – 2025
Parapoynx diminutalis
Insufficient records/data for a CUSUM analysis
Years Analysed: 2000 – 2025

Hectad (10kmx10km) Coverage: Parapoynx diminutalis
( data includes both Larvae and Adult Stages )

Flight Periods – Indicative –vs– Recorded Data
Parapoynx diminutalis
( data includes Adult Stage only )

Flight Period chart – the grey hatched area above, which can cross one or more months, pictorially represents the best guess we have for this moth's flight periods [month/s]. The coloured lines represent the actual months seen in flight, from site observation records received between 2020-2025.

Records Behind the Map and Charts - Parapoynx diminutalis – 0 records available

Listed by Year - descending - scroll across to see all table columns

No records found for Parapoynx diminutalis.

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