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Purple Hairstreak Favonius quercus (Linnaeus, 1758)

Favonius quercus Favonius quercus
  • Cambridge, Madingley Road Park & Ride TL423594, 15 Jul 2008.
  • A small butterfly which is quite widespread but seldom seen because it lives high up in oak tree tops. The adults mainly feed on aphid honeydew, and according to Butterfly Conservation are only driven down to the ground to seek fluid and nectar during prolonged drought. This one hadn't read that article.
  • Until recently listed as Neozephyrus quercus
  • NBN Atlas


Small copper Lycaena phlaeas (Linnaeus, 1761)

Lycaena phlaeas
  • Cambridge, East Pit TL484559, 23 Sep 2014.
  • Main foodplants are Common Sorrel (Rumex acetosa) and Sheep's Sorrel (R. acetosella)
  • NBN Atlas


Brown Argus Aricia agestis (Denis & Schiffermüller, 1775)

Aricia agestis
Aricia agestis
  • Cambridge 19 Aug 2000.
  • The Brown Argus is reported to have expanded its range in the last decade and is now found throughout Cambridgeshire where its larvae feed on Geranium spp.
  • Female Common Blue Polyommatus icarus are very similar but have dots near the base of the under fore-wings which are not seen on this individual. Also the upper wings generally have at least a bluish sheen on P. icarus.
  • NBN Atlas


Common Blue Polyommatus icarus (Rottemburg, 1775)

Polyommatus icarus Polyommatus icarus
  • Cambridge, Old St Ives railway line TL464614: 16 & 19 Aug 2002. (Apparently the same individual!)
  • A common species distributed over the whole of Great Britain.
  • The Adonis Blue Polyommatus bellargus is very similar on the under surface, but confined to chalkland in southern counties so not a possible contender here. P. bellargus is a brighter blue on the upper surface.
  • Larva feed on Bird's-foot-trefoil (Lotus corniculatus) and other creeping Leguminosae.
  • NBN Atlas


  • Holly Blue Celastrina argiolus (Linnaeus, 1758)

    Celastrina argiolus Celastrina argiolus Celastrina argiolus
    • Cambridge - Left: 20 Apr 2002. Centre: Male, 20 May 2001. Right: Female, 20 Apr 2002.
    • Distinctive as the only British "Blue" which is blue underneath as well as on top
    • NBN Atlas


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