Main: (Geometridae / Larentiinae)
70.120 [B&F: 1787] Argent & Sable (Rheumaptera hastata) (Linnaeus, 1758)

 

Notes: Nationally scarce (Nb) and declining, in coppiced woodland in England and southern Scotland, and on moorland in north-western Scotland and the Hebrides, a priority species under the UK Biodiversity Action Plan. In Hampshire and on the Isle of Wight used to be very common in the New Forest and other extensive areas of birch woodland during the 1940s, having previously been rare. It is now rare once more, and absent from most of its former strongholds. It was last seen at Botley Wood in 1988, Fleet Pond in 1991 and Pamber Forest in 1999. The only extant colonies appear to be at Bentley and Harewood Forest. Wingspan 34-38 mm. Unmistakable, flying by day over birches. Larva feeds on Downy Birch, Silver Birch and Bog-myrtle, over-wintering as a pupa.

Flightime guide
JFM AMJ JAS OND

Records Received By Year

% of total records
Max records: 11
       
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: 0.019481152
       
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: 30
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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