Main: (Geometridae / Sterrhinae)
70.017 [B&F: 1714] Portland Ribbon Wave (Idaea degeneraria) (Hübner, [1799])

 

Notes: A rare Red Data Book species, breeding in grassland and scrub on coastal limestone in Portland, Dorset. Also a rare immigrant from mainland Europe, appearing as a migrant on the southern coast of England, where it has become very much more common since the start of the 21st Century. In Hampshire and on the Isle of Wight first recorded from Freshwater on the Island in September 1902, thereafter at Brockenhurst in October 1962, Totton in August 1990 and Freshwater in August 1997, becoming very much more common from 2006 onwards, since when up to five have been recorded in most years. Wingspan 26-31 mm. Fairly unmistakable. Larva feeds on various herbaceous plants.

Flightime guide
JFM AMJ JAS OND

Records Received By Year

% of total records
Max records: 23
                       
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: 0.011733497
                       
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: 17
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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