Main: (Geometridae / Larentiinae)
70.047 [B&F: 1720] Gem (Nycterosea obstipata) (Fabricius, 1794)

 

Notes: Immigrant from southern Europe, appearing mainly in southern Britain, with occasional records north to the Orkneys, in some years arriving in sufficient numbers to breed. In Hampshire and on the Isle of Wight a common immigrant, which is widely distributed throughout in some years. Wingspan 18-21 mm. Highly sexually dimorphic. Larva feeds on the leaves of various herbaceous plants, although the exact plant species utilised in the United Kingdom is unknown, but unable to over-winter in significant numbers.

Flightime guide
JFM AMJ JAS OND

Records Received By Year

% of total records
Max records: 80
 
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: 0.14484414
 
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: 48
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Phenology - Larval Records

Max records: 1
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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