Main: (Lycaenidae / Theclinae)
61.012 [B&F: 1580] Holly Blue (Celastrina argiolus) (Linnaeus, 1758)

 

Notes: In England and Wales this species is widespread and common, south of a line running from Cumberland in the west to County Durham in the east; also found on the Isle of Man and throughout Ireland, but absent from Scotland except as a scarce vagrant. A frequent visitor to gardens, it is doing well and the distribution is spreading northwards. This species is renowned for fluctuating wildly in numbers, forming a predictable cycle over a few years, believed to be caused by parasitism from the wasp Listrodomus nycthemerus.

In Hampshire and on the Isle of Wight widespread and common. Wingspan 26-34 mm. Larva feeds on Holly, Ivy, Gorse, Dogwood, Spindle and Alder Buckthorn.

Flightime guide
JFM AMJ JAS OND

Records Received By Year

% of total records
Max records: 2852
         
90 91 92 93 94 95 96 97 98 99 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16

Percentage of Total Records

Total records
Max Percentage: 1.3893692
         
90 91 92 93 94 95 96 97 98 99 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16

Phenology - Adult Records

Max records: 1559
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Phenology - Larval 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
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