Main: (Geometridae / Larentiinae)
70.075 [B&F: 1778] May Highflier (Hydriomena impluviata) ([Denis & Schiffermüller], 1775)

 

Common in damp woodland, marshes, river-banks and other damp areas throughout the British Isles. Widespread and common in Hampshire, but scarce on the Isle of Wight, with only two records so far this century. Wingspan 30-34 mm. The main confusion species is Ruddy Highflyer H. ruberata, which is often reddish-brown and has a more westerly and northerly distribution, but grey forms of Ruddy Highflyer are difficult to distinguish from May Highflier. Larva feeds on Alder, over-wintering as a pupa.

Flightime guide
JFM AMJ JAS OND

Records Received By Year

% of total records
Max records: 146
00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19

Percentage of Total Records

Total records
Max Percentage: 0.083662525
00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19

Phenology - Adult Records

Max records: 273
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
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