Main: (Notodontidae / Thaumetopoeinae)
71.001 [B&F: 2022] Oak Processionary (Thaumetopoea processionea) (Linnaeus, 1758)


Notes: Rare immigrant from mainland Europe, appearing in southern England. In Hampshire most of the 15 or so records of this species (all males), since the first in 1983, were caught within the first three weeks of August. It is expanding its range on the continent and is resident on the Channel Islands. On the Isle of Wight, recorded twice, both times in September. Wingspan male 31-35 mm, female 36-41 mm. Similar to Pine Processionary T. pityocampa, but has smaller and weaker comma-shaped marking in the centre of the forewing. Larva feeds on Sessile Oak, Pedunculate Oak, Turkey Oak and Evergreen Oak, living gregariously within a silken web, causing sufficient damage to be a serious pest in some areas, no evidence of breeding in the UK. The caterpillars are covered in tiny hairs which contain a defensive toxin that can cause severe allergic reactions if they come into contact with people and pets. Occurrence should be reported to Department for Environment, Food and Rural Affairs.

Flightime guide

Records Received By Year

% of total records
Max records: 2
90 91 92 93 94 95 96 97 98 99 00 01 02 03 04 05 06 07 08 09 10 11 12 13

Percentage of Total Records

Total records
Max Percentage: 0.003968333
90 91 92 93 94 95 96 97 98 99 00 01 02 03 04 05 06 07 08 09 10 11 12 13

Phenology - Adult Records

Max records: 2
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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