Main: (Erebidae / Erebinae)
72.076 [B&F: 2451] Clifden Nonpareil (Blue Underwing) (Catocala fraxini) (Linnaeus, 1758)


Rare immigrant from north-eastern Europe, appearing in southern and eastern England, the species was temporarily established in Kent and the Norfolk Broads in the past; it now appears be making a comeback as a resident species in places. In Hampshire and on the Isle of Wight historically a rare immigrant with up to the 1995, there had been about twenty records altogether. Since 2006, the species has started to be recorded more regularly, for example, at Ventnor and Totland on the Island, and at Brockenhurst in the New Forest, and sightings have increased year on year. It is almost certainly resident in a number of localities across southern England (including our area) and while there is the possibility that some of these individuals may have originated from deliberate release of captive stock, it is most likely that most populations originate from migrants remaining to breed in this country. Wingspan male 84-100 mm, female 98-112 mm. The original name for this species, Blue Underwing, sums up the identification criteria nicely! Larva feeds on Aspen, no evidence of breeding in the UK.

Flightime guide

Records Received By Year

% of total records
Max records: 58
00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19

Percentage of Total Records

Total records
Max Percentage: 0.033631533
00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19

Phenology - Adult Records

Max records: 69
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Distribution Map

Historical distribution at tetrad resolution
Click for density map

Record Density

As above but the larger the symbol, the greater the number of records
Click for distribution map

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