15.005 Caloptilia betulicola (Birch Stilt)
ws: 14-16mm; bivoltine - Jun-Jul, Sep-Apr; birch (Betula spp.); widespread and common throughout UK
Caloptilia betulicola §1 female
ID: Keyed as - S2 of labial palps not tufted; forewing unmarked; ws 14-16mm; hindleg with trochanter and adjacent area white.
§1 illustrates a difficulty with devising a key for this genus and in particular with using the one in MBGBI2, which assumes the costal blotch is absent or indistinct for this species. However the species text states that the costal blotch is usually present!
Genital determination usually required.
§1 illustrates a difficulty with devising a key for this genus and in particular with using the one in MBGBI2, which assumes the costal blotch is absent or indistinct for this species. However the species text states that the costal blotch is usually present!
Genital determination usually required.
§1 Westcliff-on-sea, Essex; 05/08/2009; female; fw 6.9mm
§2 Pound Wood, Essex; 11/07/2019; female; fw 6.8mm
§3 Pound Wood, Essex; 22/07/2020; female; fw 6.5mm
§4 Cliburn Moss, Cumbria; 26/04/2021; male; fw 6.8mm; to light
§5 Little Clacton, Essex; 05/11/2023; male; fw 8.1mm; to light (specimen provided by Gavin Price)
All images © Chris Lewis
§2 Pound Wood, Essex; 11/07/2019; female; fw 6.8mm
§3 Pound Wood, Essex; 22/07/2020; female; fw 6.5mm
§4 Cliburn Moss, Cumbria; 26/04/2021; male; fw 6.8mm; to light
§5 Little Clacton, Essex; 05/11/2023; male; fw 8.1mm; to light (specimen provided by Gavin Price)
All images © Chris Lewis
Page published Feb 2011 (§1) | §2 added 11/07/2019 | §3 added 01/02/2021 | §4 added 12/05/2021 | §5 added 24/03/2024
